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SKUHRAVY v.. Dr., Entomological Laboratory, Czechoslovak Academy of Scien- 

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SLÄMA K., Dr., Entomological Laboratory, Czechoslovak Academy of Sciences, 

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SLÎPK1A J., Dr., C. Sc, Histologico-embryological Institute, Med. Faculty, Plzeu, 

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SMETANA A., Dr., Biological Institute, Czechoslovak Academy of Sciences - Dept. 

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SKROBAL D., Dr., Apicultural Research Station, Czechoslovak Academy of Agricul- 

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