Systematics of the genus Augochlorella (Hymenoptera, Halictidae) north of MexicoPublished in Kansas University Science Bulletin, in 1966, in volume 46, pages 509-624The classification of the Diphaglossinae and North American species of the genus Caupolicana (Hymenoptera, Colletidae)Published in Kansas University Science Bulletin, in 1966, in volume 46, pages 717-751
The classification of the Diphaglossinae and North American species of the genus Caupolicana (Hymenoptera, Colletidae)Published in Kansas University Science Bulletin, in 1966, in volume 46, pages 717-751