Klassifikation enligt LCQK50.M3613

agriculture(277) American West(111) art(1,002) biography(456) biology(2,172) botany(11,085) Britain(216) California(468) Canada(333) conservation(80) cooking(285) desert(124) deserts(56) drawing(179) Eastern United States(63) ecology(819) environment(320) Europe(152) evolution(158) exploration(132) flowers(3,631) folklore(242) food(963) garden(755) gardening(3,282) gardens(380) growing(139) guide(643) guidebook(355) Hawaii(174) health(374) herbalism(450) history(1,121) history of science(110) homesteading(66) horticulture(666) informational(130) leaves(110) life cycle(219) life science(177) medicine(332) natural science(144) natural world(59) nature(5,833) nature writing(77) New Mexico(103) North America(822) Northwest(68) outdoors(226) photographs(115) photography(217) picture book(504) poison(104) prairie(105) reference(2,808) roots(50) science(4,776) seed(109) self-sufficiency(107) Southwest(142) spring(349) survival(202) Texas(327) travel(290) trees(1,988) tropical(45) usa(470) Washington(110) wildlife(133)