Smetana, Ales Revision of the genus hydrochara berth (coleoptera: hydrophilidae) - Ottawa Entolological Society of Canada 1980 - 100 p. - - Memoirs of the entomological society of canada-No; 111 . ISBN: 245318 Subjects--Topical Terms: Coleoptera Dewey Class. No.: 595.76 / SME