| Natural history -- Antarctica. Matches 1 item |
| Natural history -- Appalachian Trail. Matches 1 item |
| Natural history -- Appalchian Region. Matches 1 item |
| Natural history -- Arctic regions. Matches 1 item |
| Natural history -- Arizona -- Grand Canyon -- Juvenile literature. Matches 1 item |
| Natural history -- Australia. Matches 1 item |
| Natural history -- Australia -- Great Barrier Reef (Qld.) Matches 1 item |
| Natural history -- Badlands (S.D. and Neb.) Matches 1 item |
| Natural history -- Brazil. Matches 1 item |
| Natural history -- Canada. Matches 1 item |