Studies on North American bees of the genus Hylaeus. 4. The subgenera Cephalylaeus, Metziella and Hylaeana (Hymenoptera: Colletidae)
Published in Contributions in Science, in 1968, in volume 144, pages 1-6
Date published:1968
Published in Contributions in Science, in 1968, in volume 144, pages 1-6
Date published:1968