Matches in Library of Congress for { ?s ?p 1981. }
- 80019025 date "1981".
- 80019026%2F%2Fr953 date "1981".
- 80019027 date "1981".
- 80019028 date "1981".
- 80019033 date "1981".
- 80019036 date "1981".
- 80019037%2F%2Fr93 date "1981".
- 80019042 date "1981".
- 80019043 date "1981".
- 80019046 date "1981".
- 80019052 date "1981".
- 80019053%2F%2Fr97 date "1981".
- 80019054%2F%2Fr853 date "1981".
- 80019057%2F%2Fr84 date "1981".
- 80019059 date "1981".
- 80019063%2F%2Fr98 date "1981".
- 80019071 date "1981".
- 80019076%2F%2Fr90 date "1981".
- 80019077 date "1981".
- 80019083 date "1981".
- 80019088 date "1981".
- 80019091 date "1981".
- 80019092 date "1981".
- 80019096 date "1981".
- 80019098 date "1981".
- 80019100 date "1981".
- 80019103 date "1981".
- 80019104 date "1981".
- 80019105 date "1981".
- 80019107 date "1981".
- 80019108%2F%2Fr932 date "1981".
- 80019109 date "1981".
- 80019110%2F%2Fr95 date "1981".
- 80019116 date "1981".
- 80019117 date "1981".
- 80019121%2F%2Fr93 date "1981".
- 80019125%2F%2Fr89 date "1981".
- 80019128%2FMN date "1981".
- 80019129%2F%2Fr98 date "1981".
- 80019132 date "1981".
- 80019140 date "1981".
- 80019143 date "1981".
- 80019152%2F%2Fr85 date "1981".
- 80019156%2F%2Fr91 date "1981".
- 80019162 date "1981".
- 80019164 date "1981".
- 80019174%2F%2Fr91 date "1981".
- 80019176 date "1981".
- 80019178%2F%2Fr91 date "1981".
- 80019184 date "1981".
- 80019185%2F%2Fr942 date "1981".
- 80019186 date "1981".
- 80019187 date "1981".
- 80019189 date "1981".
- 80019193 date "1981".
- 80019194 date "1981".
- 80019197 date "1981".
- 80019201 date "1981".
- 80019205%2F%2Fr83 date "1981".
- 80019209 date "1981".
- 80019211 date "1981".
- 80019218 date "1981".
- 80019219%2F%2Fr862 date "1981".
- 80019220%2F%2Fr84 date "1981".
- 80019223%2F%2Fr862 date "1981".
- 80019224 date "1981".
- 80019230%2F%2Fr932 date "1981".
- 80019231%2F%2Fr942 date "1981".
- 80019232 date "1981".
- 80019235 date "1981".
- 80019237 date "1981".
- 80019248 date "1981".
- 80019249%2F%2Fr954 date "1981".
- 80019252 date "1981".
- 80019253%2F%2Fr89 date "1981".
- 80019254 date "1981".
- 80019255%2F%2Fr84 date "1981".
- 80019256 date "1981".
- 80019257 date "1981".
- 80019258 date "1981".
- 80019259%2F%2Fr84 date "1981".
- 80019270 date "1981".
- 80019271 date "1981".
- 80019274 date "1981".
- 80019275 date "1981".
- 80019277%2F%2Fr922 date "1981".
- 80019278 date "1981".
- 80019287%2F%2Fr85 date "1981".
- 80019294 date "1981".
- 80019295 date "1981".
- 80019296%2F%2Fr932 date "1981".
- 80019299 date "1981".
- 80019301 date "1981".
- 80019303 date "1981".
- 80019304 date "1981".
- 80019306 date "1981".
- 80019312%2F%2Fr88 date "1981".
- 80019316 date "1981".
- 80019317%2F%2Fr91 date "1981".
- 80019331 date "1981".