Matches in Library of Congress for { ?s ?p 1981-. }
- 84902864%2FSA dateCopyrighted "1981-".
- 84902865%2FSA dateCopyrighted "1981-".
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- 85942785%2FSA%2Fr90 dateCopyrighted "1981-".
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- 86144056%2FNE%2Fr932 dateCopyrighted "1981-".
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- 86189505%2FNE dateCopyrighted "1981-".
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- 86194871 dateCopyrighted "1981-".
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- 87968267%2FNE dateCopyrighted "1981-".
- 88112032 dateCopyrighted "1981-".
- 88128615 dateCopyrighted "1981-".
- 88139008 dateCopyrighted "1981-".
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- 88156897 dateCopyrighted "1981-".
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- 88904029 dateCopyrighted "1981-".
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- 89150937 dateCopyrighted "1981-".
- 89161362 dateCopyrighted "1981-".
- 89216273 dateCopyrighted "1981-".