Matches in Library of Congress for { ?s ?p 1981. }
- 80054121%2F%2Fr90 date "1981".
- 80054128 date "1981".
- 80054135 date "1981".
- 80054139 date "1981".
- 80054140 date "1981".
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- 80054335%2F%2Fr92 date "1981".
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- 80054349 date "1981".
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- 80054380%2F%2Fr92 date "1981".
- 80054382%2F%2Fr922 date "1981".
- 80054383%2F%2Fr96 date "1981".
- 80054384 date "1981".
- 80054385 date "1981".