Matches in Library of Congress for { ?s ?p 1981. }
- 80028602 date "1981".
- 80028603 date "1981".
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- 80028607 date "1981".
- 80028608 date "1981".
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- 80028708 date "1981".
- 80028710%2F%2Fr96 date "1981".
- 80028711 date "1981".
- 80028712 date "1981".
- 80028713 date "1981".
- 80028714 date "1981".