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- Locks (Hydraulic engineering), 5 results
- black-and-white negatives, 3 results
- Steamboats, 2 results
- Boats and boating, 2 results
- cellulose nitrate film, 2 results
- glass plate negatives, 2 results
- Rivers, 1 results
- Columbia River, 1 results
- Cascade Locks (Or.), 1 results
- black-and-white prints (photographs), 1 results