Pendergrast, J. G., An introduction to New Zealand freshwater insects / Freshwater insects of New Zealand by J.G. Pendergrast and D.R. Cowley. - ix, 100 pages : illustrations ; 19 cm Includes bibliographical references. LCCN: 67001946 Subjects--Topical Terms: Freshwater insects--New Zealand LC Class. No.: QL487 / .P4 1966a Dewey Class. No.: 595.7 595.70993