@book{71373,
	author = {Krombein, Karl V.},
	title = {Catalog of Hymenoptera in America north of Mexico},
	publisher = {Smithsonian Institution Press},
	year = {1979.},
	address = {Washington},
	note = {"An outgrowth of ... Hymenoptera of America north of Mexico, synoptic catalog (1951) including the first and second supplements (1958, 1967)"}
}