Welty, Joel Carl, 1901- The life of birds / Joel Carl Welty. - 2d ed. - Philadelphia : Saunders, 1975. - xv, 623 p. : ill. ; 28 cm. Includes index. Bibliography: p. 547-590. ISBN: 0721692311 LCCN: 74006694 Subjects--Topical Terms: Birds. LC Class. No.: QL673 / .W46 1975 Dewey Class. No.: 598