Matches in Library of Congress for { ?s ?p 1981. }
- 81001056 date "1981".
- 81001058%2F%2Fr89 date "1981".
- 81001063 date "1981".
- 81001065%2F%2Fr86 date "1981".
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- 81001067 date "1981".
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- 81001079 date "1981".
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- 81001083 date "1981".
- 81001084 date "1981".
- 81001085 date "1981".
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- 81001090 date "1981".
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- 81001094 date "1981".
- 81001095 date "1981".
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- 81001097 date "1981".
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- 81001112 date "1981".
- 81001113 date "1981".
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- 81001116 date "1981".
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- 81001143 date "1981".
- 81001144 date "1981".
- 81001145 date "1981".
- 81001146 date "1981".
- 81001147 date "1981".
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- 81001168 date "1981".
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- 81001170%2FMN%2Fr862 date "1981".
- 81001171%2FMN%2Fr83 date "1981".
- 81001172 date "1981".
- 81001173 date "1981".