Matches in Library of Congress for { ?s ?p 1981-. }
- 82215618 date "1981-".
- 82215773 date "1981-".
- 82215857 date "1981-".
- 82215908 date "1981-".
- 82217415%2F%2Fr902 date "1981-".
- 82217476 date "1981-".
- 82218625%2F%2Fr90 date "1981-".
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- 82219400%2F%2Fr91 date "1981-".
- 82220181%2F%2Fr90 date "1981-".
- 82220721 date "1981-".
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- 82224911 date "1981-".
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- 82940493 date "1981-".
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- 82960027 date "1981-".
- 82960115 date "1981-".
- 82960245 date "1981-".
- 82960290 date "1981-".