United Nations World population prospects as assessed in 1980

Engels | 101 pagina's | United Nations, New York | 1981

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United Nations Oils and gases from coal

a review of the state-of-the-art in Europe and North America; based on the work of the Symposium on the Gasification and Liquefaction of Coal held under the auspices of the United Nations Economic Commission for Europe, Katowice, Poland, 23-27 April 1979

Engels | 305 pagina's | Published for the United Nations by Pergamon, Oxford | 1980

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