Clasificación de la Biblioteca del CongresoTN869.P43

American West(36) archaeology(41) Australian history(30) biography(64) business(53) California(86) Canada(86) chemistry(99) climate change(34) conservation(19) current events(20) Devon(14) disasters(47) earth(26) ecology(45) economic history(37) economics(133) energy(238) engineering(139) environment(159) environmentalism(21) exploration(25) explosives(15) food(435) food history(108) gas(18) geography(43) geology(742) gold(160) guidebook(25) history(2,105) history of science(24) industrial revolution(20) industry(77) maps(27) Michigan(22) mining(965) natural resources(34) nature(65) New Mexico(133) oil(297) peak oil(77) photography(61) politics(65) pollution(18) precious metals(8) reference(103) references(10) regional(20) rescue(21) resources(16) science(490) science and technology(12) social history(59) spices(26) steel(30) stone(13) survival(53) sustainability(45) Texas(37) trade(41) treasure hunting(8) usa(102)