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Bächli Gerhard
Drosophilidae (Diptera) from the Hardangervidda and a survey of the family in Norway
Gerhard Bächli
Bok Bokmål 1986
The Drosophilidae (Diptera) of Fennoscandia and Denmark
by Gerhard Bächli... [et al.]
Bok Engelsk 2004
Drosophilidae (Dipteria)
Irina Brake, Gerhard Bächli
Bok Engelsk 2008