Съезд промышленных пчеловодов России
Доклад: Поемрепродуктор Среднерусской пчелы и использование ее на крупных промышленных пасеках
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![«Великая победа под Ленинградом» [1944 г.]](https://sun9-75.userapi.com/iFqP2RgXElR8DV0XX8oz1us90EtcV2ltzVoMZw/4eFU7Dcph2g.jpg)
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