Matches in Library of Congress for { ?s ?p 1981. }
- 80028374 date "1981".
- 80028375 date "1981".
- 80028377%2F%2Fr90 date "1981".
- 80028378 date "1981".
- 80028379 date "1981".
- 80028380 date "1981".
- 80028381 date "1981".
- 80028382%2F%2Fr98 date "1981".
- 80028383 date "1981".
- 80028384 date "1981".
- 80028385%2F%2Fr82 date "1981".
- 80028386 date "1981".
- 80028390 date "1981".
- 80028391 date "1981".
- 80028392 date "1981".
- 80028393 date "1981".
- 80028394 date "1981".
- 80028395 date "1981".
- 80028396 date "1981".
- 80028398 date "1981".
- 80028399%2F%2Fr944 date "1981".
- 80028400 date "1981".
- 80028401%2F%2Fr85 date "1981".
- 80028402 date "1981".
- 80028404 date "1981".
- 80028405 date "1981".
- 80028407%2F%2Fr83 date "1981".
- 80028408 date "1981".
- 80028409 date "1981".
- 80028410 date "1981".
- 80028411%2F%2Fr842 date "1981".
- 80028412 date "1981".
- 80028413 date "1981".
- 80028414 date "1981".
- 80028415 date "1981".
- 80028416 date "1981".
- 80028417 date "1981".
- 80028419 date "1981".
- 80028420 date "1981".
- 80028421%2F%2Fr89 date "1981".
- 80028422%2F%2Fr93 date "1981".
- 80028423 date "1981".
- 80028424 date "1981".
- 80028425 date "1981".
- 80028426 date "1981".
- 80028427 date "1981".
- 80028428 date "1981".
- 80028429 date "1981".
- 80028430 date "1981".
- 80028431%2F%2Fr832 date "1981".
- 80028432 date "1981".
- 80028434 date "1981".
- 80028435 date "1981".
- 80028436 date "1981".
- 80028437 date "1981".
- 80028438 date "1981".
- 80028439 date "1981".
- 80028440 date "1981".
- 80028441 date "1981".
- 80028443%2F%2Fr86 date "1981".
- 80028444 date "1981".
- 80028446%2F%2Fr93 date "1981".
- 80028449 date "1981".
- 80028450 date "1981".
- 80028451 date "1981".
- 80028452%2F%2Fr88 date "1981".
- 80028453%2F%2Fr912 date "1981".
- 80028454 date "1981".
- 80028455 date "1981".
- 80028456%2F%2Fr932 date "1981".
- 80028457 date "1981".
- 80028458 date "1981".
- 80028459 date "1981".
- 80028460 date "1981".
- 80028461 date "1981".
- 80028462 date "1981".
- 80028463 date "1981".
- 80028464%2F%2Fr82 date "1981".
- 80028465 date "1981".
- 80028466 date "1981".
- 80028467 date "1981".
- 80028468%2F%2Fr922 date "1981".
- 80028469 date "1981".
- 80028470 date "1981".
- 80028471 date "1981".
- 80028472 date "1981".
- 80028473 date "1981".
- 80028474 date "1981".
- 80028475 date "1981".
- 80028476 date "1981".
- 80028478 date "1981".
- 80028479%2F%2Fr93 date "1981".
- 80028481%2F%2Fr95 date "1981".
- 80028482%2F%2Fr953 date "1981".
- 80028483 date "1981".
- 80028484 date "1981".
- 80028486 date "1981".
- 80028487 date "1981".
- 80028488 date "1981".
- 80028489%2F%2Fr84 date "1981".