The global commons. Policy for the planet / by Harlan Cleveland ; with papers by Murray Gell-Mann and Shirley Hufstedler. Policy for the planet Cleveland, Harlan. Aspen Institute. Environmental policy Congresses. HC79.E5 C59 1990 363.7 20 CLE "This booklet is based on a 40th anniversary symposium convened by the Aspen Institute in Aspen, Colorado, July 5-7, 1989." Includes index. [Queenstown, Md.] : Aspen Institute ; Lanham, MD : University Press of America, c1990. c1990. 1990 Text xi, 118 p. : eng