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Subject
- Educational films3
- African American inventors1
- Bioremediation1
- Carver, George Washington, 1864?-19431
- Compost1
- Drew, Charles, 1904-19501
- Hispanic American scientists1
- Inventors1
- Magnetic resonance imaging1
- Medical photography1
- Morgan, Garrett A., 1877-19631
- Ophthalmoscopes1
- Photography1
- Recycling (Waste, etc.)1
- Refuse and refuse disposal1
- Science--Study and teaching1
- Space photography1
- Underwater photography1
- Waste products as fuel1
- Woods, Granville, 1856-19101