@book{46673,
	author = {Timberlake, P. H.},
	title = {A revisional study of the bees of the genus Perdita F. Smith, with special reference to fauna of the e Pacific coastast (Hymenoptera, Apoidea)},
	publisher = {University of California,},
	year = {1956- .},
	series = {University of California publications in entomology},
	address = {Berkeley :},
	note = {La biblioteca tiene : v.2-4}
}