A guide to the natural world : and index to the Life nature library / by the editors of Time-Life Books. - New York : Time-Life Books, 1968. - 210 pages : illustrations (some color) ; 28 cm. - Life nature library. . - 502 (09) (NLA) . Subjects--Corporate Names: Time-Life Books Life nature library Subjects--Topical Terms: Natural history Universal Decimal Class. No.: 502 (09) (NLA)