Ley, Willy, 1906-1969. The poles, by Willy Ley and the editors of Life. - New York, Time, inc. [1962] - 192 p. illus. 28 cm. - Life nature library . LCCN: 62013534 /L/r88 Subjects--Geographic Terms: Polar regions. LC Class. No.: G590 / .L4 Dewey Class. No.: 919