Matches in Library of Congress for { ?s ?p 1981. }
- 80029320%2F%2Fr935 date "1981".
- 80029321 date "1981".
- 80029323 date "1981".
- 80029325 date "1981".
- 80029326 date "1981".
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- 80029380 date "1981".
- 80029381 date "1981".
- 80029382 date "1981".
- 80029383 date "1981".
- 80029384 date "1981".
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- 80029410 date "1981".
- 80029411 date "1981".
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- 80029413 date "1981".
- 80029415 date "1981".
- 80029416 date "1981".
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- 80029420%2F%2Fr84 date "1981".
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- 80029431%2F%2Fr862 date "1981".
- 80029432%2F%2Fr852 date "1981".
- 80029433 date "1981".
- 80029434%2F%2Fr88 date "1981".
- 80029435 date "1981".
- 80029437%2F%2Fr852 date "1981".
- 80029438 date "1981".
- 80029439 date "1981".