1
Government, environment. 4, proceedings vol 1 : Unitar/UNDP International Conference on Heavy Crude and Tar Sands : Edmonton, 07.08.88-12.08.88.
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2
Mining, drilling. 4, proceedings vol 3 : Unitar/UNDP International Conference on Heavy Crude and Tar Sands : Edmonton, 07.08.88-12.08.88.
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3
Geology, chemistry. 4, proceedings vol 2 : Unitar/UNDP International Conference on Heavy Crude and Tar Sands : Edmonton, 07.08.88-12.08.88.
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4
In situ recovery. 4, proceedings vol 4 : Unitar/UNDP International Conference on Heavy Crude and Tar Sands : Edmonton, 07.08.88-12.08.88.
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5
The future of heavy crude oils and tar sands international conference 0001 : Edmonton, 04.06.79-12.06.79.
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6
The future of heavy crude and tar sands international conference 0002 : Caracas, 07.02.82-17.02.82.
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7
The future supply of nature made petroleum and gas: technical reports : UNITAR conference on energy and the future 0001 : IIASA conference on energy resources 0002 : Laxenburg, 05.07.76-16.07.76.
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8
Long term energy resources: an international conference. vol 0001 : Montreal, 26.11.79-07.12.79.
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9
Long term energy resources: an international conference. vol 0002 : Montreal, 26.11.79-07.12.79.
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10
Long term energy resources: an international conference. vol 0003 : Montreal, 26.11.79-07.12.79.
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