Matches in Library of Congress for { ?s ?p 1981. }
- 80025275 date "1981".
- 80025276%2F%2Fr90 date "1981".
- 80025277%2F%2Fr85 date "1981".
- 80025278%2F%2Fr85 date "1981".
- 80025279 date "1981".
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- 80025285 date "1981".
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- 80025292%2F%2Fr85 date "1981".
- 80025295 date "1981".
- 80025297%2F%2Fr83 date "1981".
- 80025298%2F%2Fr87 date "1981".
- 80025299 date "1981".
- 80025300 date "1981".
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- 80025311%2F%2Fr933 date "1981".
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- 80025326%2F%2Fr902 date "1981".
- 80025327 date "1981".
- 80025328 date "1981".
- 80025329 date "1981".
- 80025330 date "1981".
- 80025331%2F%2Fr85 date "1981".
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- 80025333 date "1981".
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- 80025364%2F%2Fr82 date "1981".
- 80025365 date "1981".
- 80025366 date "1981".
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- 80025373 date "1981".
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- 80025386%2F%2Fr88 date "1981".
- 80025388 date "1981".
- 80025389 date "1981".
- 80025390 date "1981".
- 80025391%2F%2Fr84 date "1981".
- 80025392%2F%2Fr84 date "1981".
- 80025394 date "1981".
- 80025395%2F%2Fr922 date "1981".
- 80025396%2F%2Fr852 date "1981".
- 80025398%2F%2Fr96 date "1981".