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Cat. no.
Title
CZK
EUR
SCZ 033
Young F. N., 1969: A checklist of the American Bidessini (Coleoptera: Dytiscidae-Hydroporinae). 5 pp. Smithsonian Contributions to Zoology
150
6
SCZ 099
Youssef N. N., 1971: Topography of the cephalic musculature and nervous system of the honey bee Apis mellifera Linnaeus. 54 pp. Smithsonian contributions to zoology