Subjects: history
- Natural history -- Indonesia
- Natural history -- Indonesia -- Sumatra
- Natural history -- Iowa
- Natural history -- Juvenile fiction
- Natural history -- Juvenile literature
- Natural history -- Lapland
- Natural history -- Louisiana -- Early works to 1800
- Natural history -- Macedonia
- Natural history -- Madagascar
- Natural history -- Malay Archipelago
- Natural history -- Mascarene Islands
- Natural history -- Massachusetts
- Natural history -- Massachusetts -- Cape Cod
- Natural history -- Massachusetts -- Ipswich
- Natural history -- Massachusetts -- Walden Woods
- Natural history -- Mexico
- Natural history -- Minnesota
- Natural history -- Montana -- Glacier National Park (Mont.)
- Natural history -- Mozambique
- Natural history museums -- England -- London -- Guidebooks
- Natural history -- Nebraska -- Agate Fossil Beds National Monument
- Natural history -- Netherlands
- Natural history -- Netherlands -- Juvenile literature
- Natural history -- Netherlands -- Texel -- Juvenile literature
- Natural history -- New England
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