Indicators of Environmental quality /

por Thomas, William A.
Publicado 1972

Indicators of environmental quality : proceedings of a symposium held during the AAAS meeting in Philadelphia, Pennsylvania, Decembrer 26-31, 1971 /

por Thomas, William A. 1939-
Publicado 1974

Indicators of environmental quality : proceedings of a symposium held during the AAAS meeting in Philadelphia, Pennylvania, december 26-31,1971 /

Publicado 1974

Indicators of enviromental quality : proceedings of a symposium held during the AAAS meeting in Philadelphia Pa. 1971 /

Publicado 1974