World directory of environmental organizations: a handbook of national and international organizations and programs governmental and non -governmental concerned with protecting the earth's resources
/ edited by Ted Trzyna with the asistance of Julie Didion
6th ed
Claremont, Calif
: California Institute of public Affairs
, 2001 = 1380.
۲۶۳ص
(3rd ed.-6th ed.: Who's doing what series; no. 2)