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Subjects
- Geologists[remove]6
- College teachers4
- Photographic prints4
- Field notes2
- Maps (documents)2
- World War, 1914-19182
- Authors, American1
- Cartoons (working drawings)1
- Cryptoexplosion structures1
- Drawings (visual works)1
- Earthquakes1
- Families -- Georgia1
- Families -- Massachusetts -- Cambridge1
- Families -- Michigan -- Houghton1
- Financial records1
- Geology -- Fieldwork1
- Geology -- South America1
- Geology -- Study and teaching1
- Geology -- West (U.S.)1
- Geology, Stratigraphic1