@book{17436,
	author = {Hurd, Paul D., Jr. and Lensley, E. Gorton.},
	title = {The principal Larrea bees of the Southwestern united States Hymenoptera},
	publisher = {Smithsonian Institution,},
	year = {1975},
	series = {Smithsonian contributions to zoology},
	address = {Washington :}
}