Matches in Library of Congress for { ?s ?p 1981-. }
- 81170540 date "1981-".
- 81170788%2F%2Fr89 date "1981-".
- 81171093%2F%2Fr90 date "1981-".
- 81171133 date "1981-".
- 81171487 date "1981-".
- 81171488%2F%2Fr82 date "1981-".
- 81171716 date "1981-".
- 81171850 date "1981-".
- 81171983%2F%2Fr91 date "1981-".
- 81172480 date "1981-".
- 81172620 date "1981-".
- 81172635%2F%2Fr86 date "1981-".
- 81172637 date "1981-".
- 81173127 date "1981-".
- 81173308 date "1981-".
- 81173423%2F%2Fr90 date "1981-".
- 81175320 date "1981-".
- 81175569 date "1981-".
- 81176065%2F%2Fr97 date "1981-".
- 81176223%2F%2Fr922 date "1981-".
- 81176398%2F%2Fr90 date "1981-".
- 81176508%2F%2Fr842 date "1981-".
- 81176707 date "1981-".
- 81177024 date "1981-".
- 81177619 date "1981-".
- 81177765 date "1981-".
- 81177935 date "1981-".
- 81177962 date "1981-".
- 81178141 date "1981-".
- 81178511 date "1981-".
- 81178737 date "1981-".
- 81180149 date "1981-".
- 81181625 date "1981-".
- 81182213 date "1981-".
- 81182568 date "1981-".
- 81182812%2F%2Fr98 date "1981-".
- 81183125 date "1981-".
- 81183857 date "1981-".
- 81183858 date "1981-".
- 81184000 date "1981-".
- 81184132 date "1981-".
- 81184323%2F%2Fr902 date "1981-".
- 81184324%2F%2Fr96 date "1981-".
- 81184402%2F%2Fr84 date "1981-".
- 81184418 date "1981-".
- 81184500%2F%2Fr83 date "1981-".
- 81184534 date "1981-".
- 81184655 date "1981-".
- 81184768 date "1981-".
- 81184948 date "1981-".
- 81184949 date "1981-".
- 81185480 date "1981-".
- 81185508%2F%2Fr97 date "1981-".
- 81186409 date "1981-".
- 81187447 date "1981-".
- 81187486 date "1981-".
- 81187741 date "1981-".
- 81187811%2F%2Fr964 date "1981-".
- 81187953 date "1981-".
- 81188033 date "1981-".
- 81188713 date "1981-".
- 81189046 date "1981-".
- 81189116 date "1981-".
- 81189178%2F%2Fr922 date "1981-".
- 81190360%2F%2Fr83 date "1981-".
- 81190361%2F%2Fr922 date "1981-".
- 81190856 date "1981-".
- 81191493 date "1981-".
- 81192270 date "1981-".
- 81192357 date "1981-".
- 81192811 date "1981-".
- 81192834 date "1981-".
- 81193093%2F%2Fr92 date "1981-".
- 81193103 date "1981-".
- 81193850 date "1981-".
- 81194074 date "1981-".
- 81194089 date "1981-".
- 81194720 date "1981-".
- 81195120 date "1981-".
- 81195228 date "1981-".
- 81195554 date "1981-".
- 81196363%2F%2Fr912 date "1981-".
- 81196554 date "1981-".
- 81196604%2F%2Fr953 date "1981-".
- 81196961%2F%2Fr92 date "1981-".
- 81197447%2F%2Fr922 date "1981-".
- 81197941 date "1981-".
- 81198080 date "1981-".
- 81198179%2F%2Fr88 date "1981-".
- 81198185 date "1981-".
- 81198458%2F%2Fr952 date "1981-".
- 81198620%2F%2Fr90 date "1981-".
- 81198727 date "1981-".
- 81198729 date "1981-".
- 81198791 date "1981-".
- 81199019 date "1981-".
- 81199082 date "1981-".
- 81200711%2F%2Fr92 date "1981-".
- 81201074%2F%2Fr90 date "1981-".
- 81201333 date "1981-".