Markle, Sandra. Outside and inside birds / by Sandra Markle. - New York : Bradbury Press, c1994. - 40 p. : col. ill. Describes the bones, feathers, and other characteristics of birds. ISBN: 0027623122 LCCN: 93038910 Subjects--Topical Terms: Birds LC Class. No.: QL676.2.M36 1994 Dewey Class. No.: 598