Matches in Library of Congress for { ?s ?p 1981. }
- 80029185 date "1981".
- 80029186 date "1981".
- 80029187 date "1981".
- 80029188%2F%2Fr85 date "1981".
- 80029189 date "1981".
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- 80029239 date "1981".
- 80029240 date "1981".
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- 80029260 date "1981".
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- 80029281 date "1981".
- 80029282 date "1981".
- 80029284 date "1981".
- 80029287 date "1981".
- 80029289%2F%2Fr94 date "1981".
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- 80029314 date "1981".
- 80029316%2F%2Fr965 date "1981".
- 80029317%2F%2Fr84 date "1981".
- 80029318 date "1981".
- 80029319%2F%2Fr973 date "1981".