Austing, G. Ronald. The world of the great horned owl; text and photos. by G. Ronald Austing and John B. Holt, Jr. - [1st ed.]. - Philadelphia, Lippincott [1966] - 158 p. illus., ports. 27 cm. - Living world books . Bibliography: p. 155-156. LCCN: 65024918 //r912 Subjects--Topical Terms: Great horned owl. LC Class. No.: QL696.S8 / A9 Dewey Class. No.: 598.97