List of publications on apiculture contained in the U.S. Department of ...
... Cours .Vapiculturo : p. 19-21. ;. ? ?. ,. ,. ,. ?. . BgI i.-^vskii ,. A. G. Yrigi pcbel. Opisanio vragov pchGl sro^'i zhivotnogo tsarstva, ikh obraz'^, zhizni. 
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