Санкт-Петербургский государственный политехнический университет. Фундаментальная библиотека. — Виртуальный архив выставки "Сергей Юльевич Витте и его время: конец XIX - начало XX века" [Электронный ресурс] / сост. В.В. Чепарухин, А.А. Немчанинов, М.В. Плохих. — Электрон. текстовые дан. (145 файлов : 2,44 Мб). — Санкт-Петербург, 2005. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Internet Explorer. — <URL:http://elib.spbstu.ru/dl/657/index.html>.
| Period | Read | Copy | Open | Total | ||
|---|---|---|---|---|---|---|
| Year 2012 | Quarter 2 | 4 | 0 | 0 | 0 | 4 |
| Quarter 3 | 1 | 0 | 0 | 0 | 1 | |
| Quarter 4 | 2 | 0 | 0 | 0 | 2 | |
| Year 2013 | Quarter 1 | 5 | 0 | 0 | 0 | 5 |
| Quarter 2 | 2 | 0 | 0 | 0 | 2 | |
| Quarter 3 | 15 | 0 | 0 | 0 | 15 | |
| Quarter 4 | 4 | 0 | 0 | 0 | 4 | |
| Year 2014 | Quarter 1 | 3 | 0 | 0 | 0 | 3 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2015 | Quarter 1 | 0 | 0 | 0 | 3 | 3 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2016 | Quarter 1 | 0 | 0 | 0 | 3 | 3 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 9 | 9 | |
| Quarter 4 | 0 | 0 | 0 | 2 | 2 | |
| Year 2017 | Quarter 1 | 0 | 0 | 0 | 6 | 6 |
| Quarter 2 | 0 | 0 | 0 | 3 | 3 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 2 | 2 | |
| Year 2018 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2019 | Quarter 1 | 0 | 0 | 0 | 2 | 2 |
| Quarter 2 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 0 | 0 | |
| Year 2020 | Quarter 1 | 0 | 0 | 0 | 1 | 1 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 0 | 0 | |
| Quarter 4 | 0 | 0 | 0 | 1 | 1 | |
| Year 2021 | 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 | |
| Year 2022 | Quarter 1 | 0 | 0 | 0 | 2 | 2 |
| Quarter 2 | 0 | 0 | 0 | 1 | 1 | |
| Quarter 3 | 0 | 0 | 0 | 4 | 4 | |
| Quarter 4 | 0 | 0 | 0 | 4 | 4 | |
| Year 2023 | Quarter 1 | 0 | 0 | 0 | 0 | 0 |
| Quarter 2 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 3 | 0 | 0 | 0 | 6 | 6 | |
| Quarter 4 | 0 | 0 | 0 | 10 | 10 | |
| Year 2024 | Quarter 1 | 0 | 0 | 0 | 2 | 2 |
| Quarter 2 | 0 | 0 | 0 | 2 | 2 | |
| Quarter 3 | 0 | 0 | 0 | 10 | 10 | |
| Quarter 4 | 0 | 0 | 0 | 6 | 6 | |
| Total | 36 | 0 | 0 | 89 | 125 | |