Matches in Library of Congress for { ?s ?p 1981. }
- 80017425 date "1981".
- 80017426 date "1981".
- 80017433 date "1981".
- 80017436%2F%2Fr90 date "1981".
- 80017442%2F%2Fr90 date "1981".
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- 80017797 date "1981".
- 80017803 date "1981".
- 80017810%2F%2Fr882 date "1981".
- 80017812 date "1981".
- 80017819 date "1981".