Matches in Library of Congress for { ?s ?p 1981. }
- 80067398 date "1981".
- 80067399 date "1981".
- 80067410 date "1981".
- 80067412 date "1981".
- 80067415 date "1981".
- 80067416 date "1981".
- 80067422 date "1981".
- 80067425%2F%2Fr91 date "1981".
- 80067426 date "1981".
- 80067431 date "1981".
- 80067460 date "1981".
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- 80067486%2F%2Fr945 date "1981".
- 80067493 date "1981".
- 80067499 date "1981".
- 80067532 date "1981".
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- 80067558 date "1981".
- 80067566%2F%2Fr98 date "1981".
- 80067595 date "1981".
- 80067622 date "1981".
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- 80067633%2F%2Fr83 date "1981".
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- 80067702 date "1981".
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- 80067967 date "1981".
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- 80067983 date "1981".
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- 80068026%2F%2Fr90 date "1981".
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- 80068072 date "1981".
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- 80068099 date "1981".
- 80068100 date "1981".
- 80068108 date "1981".
- 80068117 date "1981".
- 80068120%2F%2Fr883 date "1981".