Иванова, И. Дни и ночи блокады [Электронный ресурс] / И. Иванова. — Электрон. текстовые дан. (1 файл : 160) // Политехник: издание Санкт-Петербургского государственного политехнического университета. – Санкт-Петербург. – 1987. – № 1(2863)-40(2902). — Загл. с титул. экрана. — Электрон. версия печ. публикации. — Доступ по паролю из сети Интернет (чтение). — Adobe Acrobat Reader. — <URL:http://elib.spbstu.ru/dl/politech/1987/3.pdf>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2012 | Quarter 2 | 2 | 0 | 2 | 0 | 4 |
| Quarter 3 | 2 | 0 | 0 | 0 | 2 | |
| Quarter 4 | 4 | 0 | 4 | 0 | 8 | |
| Year 2013 | Quarter 1 | 2 | 0 | 1 | 0 | 3 |
| Quarter 2 | 8 | 0 | 1 | 0 | 9 | |
| Quarter 3 | 11 | 0 | 2 | 0 | 13 | |
| Quarter 4 | 2 | 0 | 3 | 0 | 5 | |
| Year 2014 | Quarter 1 | 4 | 0 | 2 | 0 | 6 |
| Quarter 2 | 5 | 0 | 1 | 0 | 6 | |
| Quarter 3 | 8 | 0 | 1 | 0 | 9 | |
| Quarter 4 | 2 | 0 | 1 | 0 | 3 | |
| Year 2015 | Quarter 1 | 9 | 0 | 3 | 0 | 12 |
| Quarter 2 | 6 | 0 | 11 | 0 | 17 | |
| Quarter 3 | 2 | 0 | 2 | 0 | 4 | |
| Quarter 4 | 3 | 0 | 3 | 0 | 6 | |
| Year 2016 | Quarter 1 | 5 | 0 | 9 | 0 | 14 |
| Quarter 2 | 7 | 0 | 8 | 0 | 15 | |
| Quarter 3 | 2 | 0 | 4 | 0 | 6 | |
| Quarter 4 | 10 | 0 | 7 | 0 | 17 | |
| Year 2017 | Quarter 1 | 10 | 0 | 4 | 0 | 14 |
| Quarter 2 | 2 | 0 | 3 | 0 | 5 | |
| Quarter 3 | 8 | 0 | 5 | 0 | 13 | |
| Quarter 4 | 5 | 0 | 11 | 0 | 16 | |
| Year 2018 | Quarter 1 | 5 | 0 | 2 | 0 | 7 |
| Quarter 2 | 5 | 0 | 4 | 0 | 9 | |
| Quarter 3 | 4 | 0 | 4 | 0 | 8 | |
| Quarter 4 | 5 | 0 | 4 | 0 | 9 | |
| Year 2019 | Quarter 1 | 6 | 0 | 4 | 0 | 10 |
| Quarter 2 | 2 | 0 | 2 | 0 | 4 | |
| Quarter 3 | 1 | 0 | 3 | 0 | 4 | |
| Quarter 4 | 3 | 0 | 6 | 0 | 9 | |
| Year 2020 | Quarter 1 | 4 | 0 | 10 | 0 | 14 |
| Quarter 2 | 3 | 0 | 0 | 0 | 3 | |
| Quarter 3 | 2 | 0 | 0 | 0 | 2 | |
| Quarter 4 | 3 | 0 | 13 | 0 | 16 | |
| Year 2021 | Quarter 1 | 9 | 0 | 5 | 0 | 14 |
| Quarter 2 | 2 | 0 | 3 | 0 | 5 | |
| Quarter 3 | 6 | 0 | 0 | 0 | 6 | |
| Quarter 4 | 3 | 0 | 5 | 0 | 8 | |
| Year 2022 | Quarter 1 | 4 | 0 | 3 | 0 | 7 |
| Quarter 2 | 2 | 0 | 4 | 0 | 6 | |
| Quarter 3 | 5 | 0 | 10 | 0 | 15 | |
| Quarter 4 | 8 | 0 | 3 | 0 | 11 | |
| Year 2023 | Quarter 1 | 7 | 0 | 8 | 0 | 15 |
| Quarter 2 | 6 | 0 | 13 | 0 | 19 | |
| Quarter 3 | 3 | 0 | 9 | 0 | 12 | |
| Quarter 4 | 3 | 0 | 8 | 0 | 11 | |
| Total | 220 | 0 | 211 | 0 | 431 | |