A photographic and comprehensive guide to Zion & Bryce Canyon National Parks. [electronic resource] . Casper, Wyo., [1972]. 64 p. : col. illus. 31 cm. - National parkways, v. 5-6. LCCN: 72194460 Subjects--Geographic Terms: Zion National Park (Utah)Bryce Canyon National Park (Utah) LC Class. No.: F832.Z8 / W67 1972 Dewey Class. No.: 917.92/48