New North American species of bees belonging to the genus Halictus (Chloralictus)
Proceedings of the United States National Museum ; no. 2532 = vol. 65
1925
43 S.
Book
English
Synopsis of the North American flies of the genus Scellus
TIBKAT | 1925
|The North American species of Aristida
GWLB - Gottfried Wilhelm Leibniz Bibliothek | 1924
|