Санкт-Петербургский государственный политехнический университет. Фундаментальная библиотека. — Виртуальный архив выставки " А.Г.Гагарин - первый директор Санкт-Петербургского политехнического института" [Электронный ресурс] / сост. И.А. Брюханова; технологи по графике: К.С. Федосина, Г.А. Целищева, М.В. Плохих. — Электрон. дан. — СПб., 2005. — Загл. с титул. экрана. — Доступ по паролю из сети Интернет (чтение). — Internet Explorer. — <URL:http://elib.spbstu.ru/dl/1018/main.html>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2012 | Quarter 2 | 2 | 0 | 0 | 0 | 2 |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 2 | 0 | 0 | 0 | 2 | |
| Year 2013 | Quarter 1 | 4 | 0 | 0 | 0 | 4 |
| Quarter 2 | 4 | 0 | 0 | 0 | 4 | |
| Quarter 3 | 4 | 0 | 0 | 0 | 4 | |
| Quarter 4 | 4 | 0 | 0 | 0 | 4 | |
| Year 2014 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 2 | 2 | |
| Year 2015 | Quarter 1 | 0 | 0 | 0 | 9 | 9 |
| Quarter 2 | 0 | 0 | 0 | 4 | 4 | |
| Quarter 3 | 0 | 0 | 0 | 8 | 8 | |
| Quarter 4 | 0 | 0 | 0 | 1 | 1 | |
| Year 2016 | Quarter 1 | 0 | 0 | 0 | 1 | 1 |
| Quarter 2 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 3 | 0 | 0 | 0 | 3 | 3 | |
| Quarter 4 | 0 | 0 | 0 | 1 | 1 | |
| Year 2017 | Quarter 1 | 0 | 0 | 0 | 5 | 5 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 1 | 1 | |
| Year 2018 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 1 | 1 | |
| Year 2019 | Quarter 1 | 0 | 0 | 0 | 1 | 1 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| 2020 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2021 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2022 | Quarter 1 | 0 | 0 | 0 | 1 | 1 |
| Quarter 2 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 3 | 0 | 0 | 0 | 3 | 3 | |
| Quarter 4 | 0 | 0 | 0 | 12 | 12 | |
| Year 2023 | Quarter 1 | 0 | 0 | 0 | 2 | 2 |
| Quarter 2 | 0 | 0 | 0 | 4 | 4 | |
| Quarter 3 | 0 | 0 | 0 | 3 | 3 | |
| Quarter 4 | 0 | 0 | 0 | 4 | 4 | |
| Year 2024 | Quarter 1 | 0 | 0 | 0 | 4 | 4 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 21 | 21 | |
| Quarter 4 | 0 | 0 | 0 | 3 | 3 | |
| Year 2025 | Quarter 1 | 0 | 0 | 0 | 1 | 1 |
| Total | 20 | 0 | 0 | 104 | 124 | |