Clement, Roland C. Hammond nature atlas of America / by Roland C. Clement ; photographers , Erwin A. Bauer [and others] - Maplewood, N.J. : Hammond, [1973] - 255 p. : col. illus., 32 cm. 'A Ridge Press book' Bibliography : p. 251 ISBN: 0843735112 Hadiah Subjects--Topical Terms: Natural history--North America