Matches in Library of Congress for { ?s ?p 1981. }
- 80026274 date "1981".
- 80026276 date "1981".
- 80026277 date "1981".
- 80026278%2F%2Fr84 date "1981".
- 80026279%2F%2Fr853 date "1981".
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- 80026285 date "1981".
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- 80026350 date "1981".
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- 80026383 date "1981".
- 80026384 date "1981".
- 80026386 date "1981".
- 80026387 date "1981".
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- 80026408%2F%2Fr84 date "1981".
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- 80026412 date "1981".
- 80026413%2F%2Fr98 date "1981".
- 80026414 date "1981".
- 80026415 date "1981".