Based on selected papers presented at an International Conference on Environmental Impact Assessment, held at New Delhi, India in 1991.

"Published for the International Society for Ecological Modelling with the support of the United Nations Environment Programme."
Selected papers prepared for an international seminar held in New Delhi, India, in Jan. 1988, in collaboration with the International Society for Ecological Modelling.

"Published on behalf of the United Nations Industrial Development Organization and the International Association for Clean Technology."

Includes statistical tables.