The National Geographic Society (U.S.) text Washington, D.C National Geographic Society c1991 1st ed. monographic 288 p. : ill. (chiefly col.) ; 27 cm. Includes bibliographical references (p. 283) and index. n-us--- Natural history United States Habitat (Ecology) United States Nature study United States Natural history Study and teaching Activity programs United States Natural History United States Pictorial works Habitat (Ecology) United States Pictorial works QH104 .C87 1991 508.73 0870448617 (reg. ed.) 0870448625 (deluxe ed.) 91027559 UOEL 000 20150330113516.0 2015166