Classification de la Bibliothèque du CongrèsQE79.M28

19th century(107) American West(104) archaeology(78) archives(47) biography(552) biology(147) Britain(92) California(359) Canada(116) cartography(173) caves(57) chemistry(47) children(115) children's(156) climate(64) creationism(35) desert(31) dictionary(109) dinosaurs(79) earth(769) ecology(122) England(119) environment(158) evolution(190) experiments(69) general science(59) geography(823) geology(10,347) green(47) guide(114) guidebook(400) hiking(42) history(1,344) history of science(384) ice age(23) informational(63) juvenile non-fiction(37) maps(320) mining(56) Minnesota(45) National Parks(158) natural science(110) nature(769) New Mexico(283) North America(89) Northwest(25) oceanography(50) oceans(43) Ontario(36) outdoors(33) paleogeography(18) photographs(105) photography(81) picture book(168) planet(23) planets(36) popular science(120) prehistory(45) reference(630) rivers(30) roadside(19) science(5,181) science and technology(46) Scotland(110) solar system(33) Southwest(78) Texas(63) The West(23) time(39) travel(762) uk(58) US travel(15) usa(377) volcanoes(300) Washington(62) weather(91) Wyoming(127)