Feltwell, John. The encyclopedia of butterflies / [electronic resource] / John Feltwell.. — New York : : Prentice Hall General Reference,, 1993.. — 288 p. : : col. ill., col. map ; 29 cm. Includes bibliographical references (p. 288) and indexes. ISBN: 0671868284 9780671868284 LCCN: 93012184 Subjects--Topical Terms: Butterflies--Encyclopedias.Vlinders. LC Class. No.: QL541.5 / .F44 1993 Dewey Class. No.: 595.78/9/03