Matches in Library of Congress for { ?s ?p 1981. }
- 80022641 date "1981".
- 80022642 date "1981".
- 80022643 date "1981".
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- 80022646 date "1981".
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- 80022667%2F%2Fr912 date "1981".
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- 80022669 date "1981".
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- 80022788 date "1981".
- 80022790%2F%2Fr983 date "1981".
- 80022791 date "1981".
- 80022792 date "1981".
- 80022793 date "1981".
- 80022795%2F%2Fr962 date "1981".