Matches in Library of Congress for { ?s ?p Petroleum Prospecting Soviet Union.. }
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- 79385030 subject "Petroleum Prospecting Soviet Union.".
- 80463262 subject "Petroleum Prospecting Soviet Union.".
- 81114963 subject "Petroleum Prospecting Soviet Union.".
- 84239383%2F%2Fr943 subject "Petroleum Prospecting Soviet Union.".
- 85145720 subject "Petroleum Prospecting Soviet Union.".
- 86145120 subject "Petroleum Prospecting Soviet Union.".
- 91182515 subject "Petroleum Prospecting Soviet Union.".
- 91907646 subject "Petroleum Prospecting Soviet Union.".