@book{57778,
	author = {Spangles, Paul J. and Santiago, Silvia.},
	title = {A revision of the neotropical aquatic beetle genera Disersus, Pseudodisersus, and Potamophilops (Coleoptera : Elmidae)},
	publisher = {Smithsonian Institution,},
	year = {1987},
	series = {Smithsonian contributions to zoology},
	address = {Washington :}
}