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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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22 ago 1909 ano - экскурсии оказывали настолько положительное влияние на учебный процесс, что стали создаваться специальные экскурсионные биологические станции. Создана первая биостанция в г. Павловске В. Ф. Мольдэнгауэром
Adicionado na linha do tempo:
лента
By
Анна Панфилова
15 out 2017
0
0
453
Data:
22 ago 1909 ano
Agora
~ 114 years ago
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