М.: Сельхозиздат, 1980. - 8 с.
Рабочая таблица по формированию новых пчелиных семей, примерный календарный план по выводу маток и получению прироста, виды белковых подкормок.
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Author(s): Тименский П.И.
Language: Russian
Commentary: 1034124
Tags: Сельское хозяйство;Пчеловодство;Племенная работа