United Nations Institute for Training and Research., Unitar Conference on Energy and the Future,, Meyer, R. F., International Institute for Applied Systems Analysis., & IIASA Conference on Energy Resources, 2. (1977). The future supply of nature-made petroleum and gas: Technical reports : an international conference sponsored by the United Nations Institute for Training and Research (UNITAR) and the International Institute for Applied Systems Analysis (IIASA) as the first UNITAR Conference on Energy and the Future and the second IIASA Conference on Energy Resources, 5-16 July 1976, Schloss Laxenburg, Laxenburg, Austria. Oxford ; New York: Pergamon Press.

United Nations Institute for Training and Research., Unitar Conference on Energy and the Future, Richard F. Meyer, International Institute for Applied Systems Analysis, and 2d IIASA Conference on Energy Resources. The Future Supply of Nature-made Petroleum and Gas: Technical Reports : An International Conference Sponsored By the United Nations Institute for Training and Research (UNITAR) and the International Institute for Applied Systems Analysis (IIASA) As the First UNITAR Conference On Energy and the Future and the Second IIASA Conference On Energy Resources, 5-16 July 1976, Schloss Laxenburg, Laxenburg, Austria. Oxford ; New York: Pergamon Press, 1977.

United Nations Institute for Training and Research., et al. The Future Supply of Nature-made Petroleum and Gas: Technical Reports : An International Conference Sponsored By the United Nations Institute for Training and Research (UNITAR) and the International Institute for Applied Systems Analysis (IIASA) As the First UNITAR Conference On Energy and the Future and the Second IIASA Conference On Energy Resources, 5-16 July 1976, Schloss Laxenburg, Laxenburg, Austria. Oxford ; New York: Pergamon Press, 1977.