Matches in Library of Congress for { ?s ?p 1981-. }
- 80028970%2F%2Fr85 date "1981-".
- 80036748 date "1981-".
- 80036752 date "1981-".
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- 81001006 date "1981-".
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- 81105922 date "1981-".
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- 81111074 date "1981-".
- 81111614 date "1981-".
- 81112025 date "1981-".
- 81114709 date "1981-".
- 81115702%2F%2Fr95 date "1981-".