Klapálkova sbírka jepic (Ephemeroidea) v Národním Museu v Praze. Klapálek's collection of the may-flies (Ephemeroidea) in the National Museum, Praha, Czecoslovakia

Šámal J.
Acta Entomologica Musei Nationalis Pragae 8: 53-54, 1930
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Key words: Ephemeroptera, Czechoslovakia, Klapálek collecion, Prague Museum