Frohawk, F.W. 1861-1946. Birds beneficial to agriculture / F.W. Frohawk. - London : British Museum, 1919. - vi, 47 p. : ill. ; 20 cm. - British museum (natural history), economic series ; no. 9. . Includes bibliographical references. Subjects--Topical Terms: Beneficial birds. Dewey Class. No.: MISR 628.968 FRO