Лахтин, Ю. М. Материаловедение: учебник для студентов машиностроительных специальностей вузов / Ю. М. Лахтин, В. П. Леонтьева. — 2-е изд., перераб. и доп. — Москва: Машиностроение, 1980 (Санкт-Петербург, 2021). — 1 файл (28,4 Мб). — Загл. с титул. экрана. — Доступ по паролю из сети Интернет (чтение, печать). — <URL:http://elib.spbstu.ru/dl/2/ek21-44.pdf>. — DOI 10.18720/SPBPU/2/ek21-44. — Текст: электронный
|
Period
|
Read
|
Print
|
Copy
|
Open
|
Total
|
|
Year 2021
|
Quarter 4
|
December
|
3
|
0
|
0
|
0
|
3
|
|
Year 2022
|
Quarter 1
|
January
|
2
|
1
|
0
|
0
|
3
|
|
February
|
4
|
0
|
0
|
0
|
4
|
|
March
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 2
|
April
|
3
|
0
|
0
|
0
|
3
|
|
May
|
6
|
1
|
0
|
0
|
7
|
|
June
|
5
|
0
|
0
|
0
|
5
|
|
Quarter 3
|
July
|
1
|
1
|
0
|
0
|
2
|
|
August
|
0
|
0
|
0
|
0
|
0
|
|
September
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
October
|
0
|
0
|
0
|
0
|
0
|
|
November
|
1
|
0
|
0
|
0
|
1
|
|
December
|
2
|
0
|
0
|
0
|
2
|
|
Year 2023
|
Quarter 1
|
January
|
2
|
0
|
0
|
0
|
2
|
|
February
|
1
|
0
|
0
|
0
|
1
|
|
March
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 2
|
April
|
4
|
0
|
0
|
0
|
4
|
|
May
|
2
|
1
|
0
|
0
|
3
|
|
June
|
9
|
0
|
0
|
0
|
9
|
|
Quarter 3
|
July
|
0
|
0
|
0
|
0
|
0
|
|
August
|
0
|
0
|
0
|
0
|
0
|
|
September
|
2
|
1
|
0
|
0
|
3
|
|
Quarter 4
|
October
|
3
|
0
|
0
|
0
|
3
|
|
November
|
0
|
0
|
0
|
0
|
0
|
|
December
|
0
|
0
|
0
|
0
|
0
|
|
Year 2024
|
Quarter 1
|
January
|
0
|
0
|
0
|
0
|
0
|
|
February
|
3
|
0
|
0
|
0
|
3
|
|
March
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 2
|
April
|
2
|
1
|
0
|
0
|
3
|
|
Total
|
58
|
6
|
0
|
0
|
64
|
