1
Isotope hydrology. 1983, 6. Isotope hydrology : international symposium : Isotope hydrology in water resources development : international symposium : Wien, 12.09.83-16.09.83
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2
Environmental biogeochemistry : vol 0002: metals transfer and ecological mass balances : International Symposium on Environmental Biogeochemistry : 0002: proceedings : Hamilton, 08.04.75-12.04.75.
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3
Environmental biogeochemistry : vol 0001: carbon, nitrogen, phosphorus, sulfur and selenium cycles : International Symposium on Environmental Biogeochemistry : 0002: proceedings : Hamilton, 08.04.75-12.04.75.
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4
Environmental impact assessment : Principles and procedures : Scope Workshop on Impact Studies in the Environment (WISE) : Victoria-Harbour, 29.01.74-08.02.74.
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