Matches in Library of Congress for { ?s ?p Seismology Soviet Union.. }
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- 74303695 subject "Seismology Soviet Union.".
- 75589947 subject "Seismology Soviet Union.".
- 76519780 subject "Seismology Soviet Union.".
- 79407513 subject "Seismology Soviet Union.".
- 80501322 subject "Seismology Soviet Union.".
- 81478033 subject "Seismology Soviet Union.".
- 84228185 subject "Seismology Soviet Union.".
- 85132283 subject "Seismology Soviet Union.".