Matches in Library of Congress for { ?s ?p 1981. }
- 80069567 date "1981".
- 80069569 date "1981".
- 80069571%2F%2Fr85 date "1981".
- 80069576 date "1981".
- 80069577 date "1981".
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- 80069765 date "1981".
- 80069767%2F%2Fr86 date "1981".
- 80069768 date "1981".