Matches in Library of Congress for { ?s ?p 1981. }
- 80085182%2F%2Fr98 date "1981".
- 80085184 date "1981".
- 80085185%2FMN%2Fr93 date "1981".
- 80085186 date "1981".
- 80085189 date "1981".
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- 80085220 date "1981".
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- 80085229 date "1981".
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- 80085232 date "1981".
- 80085233 date "1981".
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- 80085235 date "1981".
- 80085238 date "1981".
- 80085240%2F%2Fr84 date "1981".
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- 80085247%2F%2Fr91 date "1981".
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- 80085250%2F%2Fr862 date "1981".
- 80085251 date "1981".
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- 80085275 date "1981".
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- 80085286 date "1981".
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- 80085297%2F%2Fr94 date "1981".
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- 80085325 date "1981".
- 80085327 date "1981".
- 80085328 date "1981".
- 80085329 date "1981".
- 80085331 date "1981".
- 80085332 date "1981".
- 80085335 date "1981".
- 80085336 date "1981".
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- 80085338 date "1981".
- 80085339 date "1981".
- 80085340%2F%2Fr92 date "1981".
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- 80085352%2F%2Fr97 date "1981".
- 80085359 date "1981".
- 80085360 date "1981".
- 80085363 date "1981".
- 80085367%2F%2Fr932 date "1981".