Matches in Library of Congress for { ?s ?p 1981. }
- 81001422 date "1981".
- 81001428 date "1981".
- 81001430 date "1981".
- 81001431 date "1981".
- 81001433 date "1981".
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- 81001435 date "1981".
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- 81001450 date "1981".
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- 81001459 date "1981".
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- 81001483 date "1981".
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- 81001532 date "1981".
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- 81001535 date "1981".
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- 81001538 date "1981".
- 81001539%2F%2Fr88 date "1981".
- 81001540%2F%2Fr87 date "1981".
- 81001541 date "1981".