Курсы пчеловодов | Зимовка пчел, болезни пчел, советы (продолжение) | Урок 5
Лекция на тему: - Зимовка пчел. болезни пчел, советы (Продолжение).
Занятия на курсах ведет проф. Романченко Николай Анастасьевич.
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