Նորմալ դիտում MARC դիտում ISBD Դիտում

Why On Earth? : [Questions and answers present information on science topics] / National Geographic Society (U.S.). - Washington, D.C. : National Geographic Society, 1988. - 96 p. : ill. ; 28 cm. - Books for World Explorers .

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ISBN: 0-87044-701-7 0-87044-706-8

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Reference books
Science--Miscellanea