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20par 107244 PUZACHENKO, Y.G., 120158 SOKOLOV, V.E., 74612 GUNIN, P.D., 73747 Gregg Jr., W.P., 84064 Krugman, S.L. Eds., 18533 U.S. Dept. of the Interior, Washington D.C. National Park Service, 33458 4. World Wilderness Congress Worldwide Conservation Estes Park, Colo. (EUA) 11 - 18 Set 1987
Publié 1989bibliotecaIICA