Ilmu alamiah dasar : Untuk perguruan tinggi non eksakta dan umum / Maskoeri Jasin
Cities in the wilderness :a new vision of land use in America
The western confluence :a guide to governing natural resources
Ecosystem Management in the united states : an assessment of current experience / Steven L.Yaffee . . . [at al.]
Conservation in the internet age : threats and opportunities / Edited by James N. Levitt