Matches in Library of Congress for { ?s ?p 1981. }
- 80001794 date "1981".
- 80001795 date "1981".
- 80001796 date "1981".
- 80001797 date "1981".
- 80001800 date "1981".
- 80001806 date "1981".
- 80001809%2F%2Fr85 date "1981".
- 80001813 date "1981".
- 80001815 date "1981".
- 80001817 date "1981".
- 80001818%2F%2Fr83 date "1981".
- 80001820 date "1981".
- 80001821%2F%2Fr97 date "1981".
- 80001842 date "1981".
- 80001843 date "1981".
- 80001844 date "1981".
- 80001845 date "1981".
- 80001846 date "1981".
- 80001847 date "1981".
- 80001849%2F%2Fr95 date "1981".
- 80001850 date "1981".
- 80001851%2F%2Fr93 date "1981".
- 80001852 date "1981".
- 80001853 date "1981".
- 80001854 date "1981".
- 80001856 date "1981".
- 80001857%2F%2Fr92 date "1981".
- 80001860%2F%2Fr92 date "1981".
- 80001861 date "1981".
- 80001862 date "1981".
- 80001863%2F%2Fr93 date "1981".
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- 80001874 date "1981".
- 80001875 date "1981".
- 80001876 date "1981".
- 80001877 date "1981".
- 80001878 date "1981".
- 80001879 date "1981".
- 80001880 date "1981".
- 80001881 date "1981".
- 80001882 date "1981".
- 80001883 date "1981".
- 80001884 date "1981".
- 80001885 date "1981".
- 80001886 date "1981".
- 80001887 date "1981".
- 80001888 date "1981".
- 80001889 date "1981".
- 80001890 date "1981".
- 80001891 date "1981".
- 80001892 date "1981".
- 80001893 date "1981".
- 80001894 date "1981".
- 80001895 date "1981".
- 80001897 date "1981".
- 80001898 date "1981".
- 80001899 date "1981".
- 80001901 date "1981".
- 80001902 date "1981".
- 80001903 date "1981".
- 80001904 date "1981".
- 80001905 date "1981".
- 80001906 date "1981".
- 80001908 date "1981".
- 80001909 date "1981".
- 80001983%2F%2Fr94 date "1981".
- 80001984 date "1981".
- 80001985 date "1981".
- 80001986%2F%2Fr95 date "1981".
- 80001987%2F%2Fr96 date "1981".
- 80001989 date "1981".
- 80001990%2FMN%2Fr91 date "1981".
- 80002039 date "1981".
- 80002042%2F%2Fr86 date "1981".
- 80002043 date "1981".
- 80002045 date "1981".
- 80002047%2F%2Fr84 date "1981".
- 80002049 date "1981".
- 80002052%2F%2Fr89 date "1981".
- 80002053 date "1981".
- 80002056%2F%2Fr83 date "1981".
- 80002058 date "1981".
- 80002059 date "1981".
- 80002061 date "1981".
- 80002062 date "1981".
- 80002063%2F%2Fr85 date "1981".
- 80002065 date "1981".
- 80002067 date "1981".
- 80002068 date "1981".
- 80002069 date "1981".
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- 80002073 date "1981".
- 80002074 date "1981".
- 80002076 date "1981".
- 80002077 date "1981".
- 80002078 date "1981".
- 80002079 date "1981".
- 80002080 date "1981".
- 80002082 date "1981".
- 80002083%2F%2Fr97 date "1981".