Matches in Library of Congress for { ?s ?p 1981. }
- 80027047 date "1981".
- 80027048 date "1981".
- 80027049%2F%2Fr83 date "1981".
- 80027050 date "1981".
- 80027051%2F%2Fr82 date "1981".
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- 80027075%2F%2Fr84 date "1981".
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- 80027100 date "1981".
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- 80027135%2F%2Fr90 date "1981".
- 80027136 date "1981".
- 80027137%2F%2Fr86 date "1981".
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- 80027152%2F%2Fr952 date "1981".
- 80027153%2F%2Fr93 date "1981".
- 80027154 date "1981".
- 80027155 date "1981".
- 80027156 date "1981".
- 80027157 date "1981".
- 80027158 date "1981".
- 80027159 date "1981".
- 80027160%2F%2Fr882 date "1981".
- 80027161 date "1981".