Environmental indicators :
Environmental indicators : a systematic approach to measuring and reporting on environmental policy performance in the context of sustainable development /
Allen Hammond ... [et al.].
- Washington, D.C. : World Resources Institute, 1995.
- viii, 43 p. ; 28 cm.
May 1995.
1-56973-026-1
GE140 / E58
May 1995.
1-56973-026-1
GE140 / E58