Biosphera reserves: the beginnings, the present, and the future challenges

by 84064 Krugman, S.L. Eds., 111418 ROBERTSON V., J., 73747 Gregg Jr., W.P., 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
Published 1989