| Mode: For a past period of time For all time by years For all time by quarters For all time by months |
Стекольникова, Н.В. История экологии: учебное пособие / Н.В. Стекольникова; Воронеж. гос. аграр. ун-т ; под ред. Ю.И. Житина. — Воронеж: ВГАУ, 2012 — 66 с.: ил. — <URL:http://catalog.vsau.ru/elib/books/b80308.pdf>.
| Period | Read | Copy | Open | Total | |
|---|---|---|---|---|---|
| Last day | 0 | 0 | 0 | 0 | 0 |
| Last 30 days | 0 | 0 | 0 | 0 | 0 |
| Last 365 days | 0 | 0 | 0 | 20 | 20 |
| All time | 0 | 0 | 0 | 20 | 20 |