Matches in Library of Congress for { ?s ?p 1981. }
- 80042228 date "1981".
- 80042229 date "1981".
- 80042230 date "1981".
- 80042231 date "1981".
- 80042236 date "1981".
- 80042238 date "1981".
- 80042243 date "1981".
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- 80042262%2F%2Fr85 date "1981".
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- 80042275 date "1981".
- 80042279 date "1981".
- 80042280 date "1981".
- 80042285%2F%2Fr83 date "1981".
- 80042287 date "1981".
- 80042289 date "1981".
- 80042290 date "1981".
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- 80049729 date "1981".
- 80049732 date "1981".
- 80049734 date "1981".
- 80049735 date "1981".
- 80049736 date "1981".
- 80049739 date "1981".
- 80049771 date "1981".
- 80049804 date "1981".
- 80049805 date "1981".
- 80049806 date "1981".