Clasificación de la Biblioteca del CongresoAG20

ancient astronauts(20) anecdotes(37) animals(280) Answers(51) antique(37) art(249) biology(82) bizarre(44) boys(138) children(679) children's(775) children's literature(132) coffee table(45) contemporary culture(18) crop circles(78) culture(273) Curiosities and wonders(449) curiosity(47) design(109) Desk Reference(22) dictionaries(237) dictionary(949) earth(75) eccentrics(31) education(503) educational(85) esoteric(47) everything(15) Extraterrestrials(36) factual(40) folklore(103) French language(48) games(183) general information(66) general knowledge(557) General Reference(120) general science(67) geography(240) ghosts(67) green(41) handbook(123) hierarchies(20) history(2,190) how things work(25) how-to(204) humor(1,731) ideas(47) informational(211) informative(55) inventions(84) juvenile(214) juvenile non-fiction(83) kids(204) knowledge(247) language(339) languages(46) learning(84) lists(442) literature(185) math(167) middle grade(56) Miscellanea(233) miscellany(292) mysteries(157) mystery(197) nature(203) occult(156) oddities(116) origins(33) os(36) paranormal(501) parascience(19) people(46) phenomena(19) photographs(51) photography(103) picture book(126) pop culture(277) popular science(55) pseudoscience(51) puzzles(52) quirky(29) random facts(28) reference(11,162) religion(134) research(89) science(2,240) sets(38) social studies(78) sports(96) statistics(143) strange(58) supernatural(130) Swedish(156) television(79) travel(102) unusual facts(7) weird(100) weirdness(56) words(49) world(122) writing(103) ya(86)