- Repository:
- Washington and Lee University, University Library Special Collections and Archives
- Published:
- unknown
• | Locks (Hydraulic engineering) | (2) |
• | Aqueducts | (1) |
• | Canal aqueducts | (1) |
• | Canals | (1) |
• | Canals -- Administration | (1) |
• | Canals -- Conservation and restoration | (1) |
• | Cast-iron | (1) |
• | Cement | (1) |
• | Coal mines and mining | (1) |
• | Concrete | (1) |