The National Academies Press [Электронный ресурс] / National Academy of Sciences. — Электрон. данные. — Washington: National Academy, 2003. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Internet Explorer 6.0. — <URL:http://www.nap.edu>.
| Period | Read | Copy | Open | Total | |||
|---|---|---|---|---|---|---|---|
| Year 2012 | Quarter 2 | April | 0 | 0 | 0 | 1 | 1 |
| May | 0 | 0 | 0 | 2 | 2 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 1 | 1 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| 2013 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2014 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 3 | 3 | ||
| Year 2015 | Quarter 1 | January | 0 | 0 | 0 | 1 | 1 |
| February | 0 | 0 | 0 | 1 | 1 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 2 | 2 | ||
| June | 0 | 0 | 0 | 3 | 3 | ||
| Quarter 3 | July | 0 | 0 | 0 | 1 | 1 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 1 | 1 | ||
| Quarter 4 | October | 0 | 0 | 0 | 1 | 1 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2016 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 1 | 1 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 3 | 3 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2017 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 1 | 1 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2018 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 1 | 1 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 1 | 1 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| 2019 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| 2020 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2021 | Quarter 1 | January | 0 | 0 | 0 | 1 | 1 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 1 | 1 | ||
| Quarter 2 | April | 0 | 0 | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 1 | 1 | |
| August | 0 | 0 | 0 | 0 | 0 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 2 | 2 | |
| November | 0 | 0 | 0 | 2 | 2 | ||
| December | 0 | 0 | 0 | 2 | 2 | ||
| Year 2022 | Quarter 1 | January | 0 | 0 | 0 | 2 | 2 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 1 | 1 | |
| May | 0 | 0 | 0 | 0 | 0 | ||
| June | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 3 | July | 0 | 0 | 0 | 0 | 0 | |
| August | 0 | 0 | 0 | 2 | 2 | ||
| September | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 4 | October | 0 | 0 | 0 | 1 | 1 | |
| November | 0 | 0 | 0 | 2 | 2 | ||
| December | 0 | 0 | 0 | 0 | 0 | ||
| Year 2023 | Quarter 1 | January | 0 | 0 | 0 | 0 | 0 |
| February | 0 | 0 | 0 | 0 | 0 | ||
| March | 0 | 0 | 0 | 0 | 0 | ||
| Quarter 2 | April | 0 | 0 | 0 | 6 | 6 | |
| May | 0 | 0 | 0 | 5 | 5 | ||
| June | 0 | 0 | 0 | 5 | 5 | ||
| Quarter 3 | July | 0 | 0 | 0 | 6 | 6 | |
| August | 0 | 0 | 0 | 8 | 8 | ||
| September | 0 | 0 | 0 | 5 | 5 | ||
| Quarter 4 | October | 0 | 0 | 0 | 5 | 5 | |
| November | 0 | 0 | 0 | 2 | 2 | ||
| December | 0 | 0 | 0 | 4 | 4 | ||
| Year 2024 | Quarter 1 | January | 0 | 0 | 0 | 2 | 2 |
| February | 0 | 0 | 0 | 3 | 3 | ||
| March | 0 | 0 | 0 | 2 | 2 | ||
| Quarter 2 | April | 0 | 0 | 0 | 5 | 5 | |
| May | 0 | 0 | 0 | 2 | 2 | ||
| June | 0 | 0 | 0 | 4 | 4 | ||
| Quarter 3 | July | 0 | 0 | 0 | 10 | 10 | |
| August | 0 | 0 | 0 | 7 | 7 | ||
| September | 0 | 0 | 0 | 6 | 6 | ||
| Quarter 4 | October | 0 | 0 | 0 | 10 | 10 | |
| November | 0 | 0 | 0 | 3 | 3 | ||
| December | 0 | 0 | 0 | 1 | 1 | ||
| Year 2025 | Quarter 1 | January | 0 | 0 | 0 | 8 | 8 |
| February | 0 | 0 | 0 | 8 | 8 | ||
| March | 0 | 0 | 0 | 1 | 1 | ||
| Quarter 2 | April | 0 | 0 | 0 | 2 | 2 | |
| May | 0 | 0 | 0 | 5 | 5 | ||
| June | 0 | 0 | 0 | 1 | 1 | ||
| Quarter 3 | July | 0 | 0 | 0 | 1 | 1 | |
| August | 0 | 0 | 0 | 3 | 3 | ||
| September | 0 | 0 | 0 | 22 | 22 | ||
| Quarter 4 | October | 0 | 0 | 0 | 2 | 2 | |
| November | 0 | 0 | 0 | 0 | 0 | ||
| Total | 0 | 0 | 0 | 195 | 195 | ||