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2 janv. 1960 - П.А. Завитаев

Description:

вопросы формирования природоведческих представлений и понятий, организация работы на учебно-опытном участке; методика проведения предметных уроков.

Ajouté au bande de temps:

Новая лента времени

ByАлена
25 sept. 2017

Date:

2 janv. 1960
Maintenaint
~ Il y a 64 ans
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