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Subject
- Exploring God's world4
- Bearded dragons (Reptiles)1
- Beetles1
- Body temperature1
- Conduct of life1
- Darwin, Charles Robert,--1809-1882 -- Correspondence1
- Ducks -- Behavior1
- Electronic clocks and watches1
- Elephants -- Behavior; Floods -- Texas; Trust in God1
- Eye -- Evolution1
- Gertie the Great (Duck)1
- Halos (Meteorology)1
- Insect-plant relationships1
- Lizards1
- Quartz1
- Rainbow1
- Shrews -- Behavior1
- Timekeeping1