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Topic
- Geology 87
- Oregon--History 65
- University of Oregon 65
- Drake, Charles L. 55
- Lectures and lecturing 55
- Thomas Condon 55
- Charts, diagrams, etc 39
- Watersheds 10
- Buildings 7
- Museums 7
- Rooms 7
- Portraits 6
- Universities and colleges--Faculty 6
- Rivers 5
- Dining rooms 4
- Dwellings 4
- Engineers 4
- International students 4
- Laboratories 4
- Libraries 4
