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Indicators of environmental quality : proceedings of a symposium held during the AAAS meeting in Philadelphia, Pennsylvania, December 26 - 31, 1971
Thomas, William A., (1972)
Ergebnisse des Bioindikatorenmessprogrammes 1979 : Finkenwerder, Wilhelmsburg, Marschlande
(1980)
Environmental indices
Inhaber, Herbert, (1976)
Energy risk assessment
Inhaber, Herbert, (1982)
Umwelteffekte und Risiken verschiedener Energiestrategien
Inhaber, Herbert, (1980)