Environmental policy : from regulation to economic instruments / selective bibliogrphy prepared by I. L. Kost
Environmental geology : conservation, land-use planning, and resource management / [by] Peter T. Flawn
Environmental controls in the Federal Republic of Germany and their implications for the developing countries : study / prepared by Walter Lötz
Enviromental control for irrigation and flood control projects : special session (Moscow 1975) : Italian Committee reports / International Commission on irrigation and Drainage