Klassifikation der Library of Congress [LCC] (USA)QL971.B93

anatomy(16) animals(228) babies(9) beautiful(5) biology(190) bird(5) birds(182) bugs(7) butterflies(5) chicks(6) children(14) children's(29) children's literature(6) children's picture book(5) development(49) ducks(10) Easter(15) egg(51) elementary(5) environment(11) evolution(21) farm(13) fish(12) genetics(12) Grade 2(5) growing(7) history(6) history of science(13) informational(53) informative(7) insects(26) juvenile(8) juvenile literature(6) juvenile non-fiction(8) life cycle(75) life science(23) literary nonfiction(11) mammals(7) medical(6) medicine(11) metamorphosis(12) nature(126) penguins(6) photographs(11) physiology(5) picture book(147) poetry(7) preschool(10) primary(7) reference(15) reproduction(12) reptiles(29) research(5) science(327) science nonfiction(11) snakes(9) spring(51) turtles(10)