Subject
- Irrigation75
- Water75
- Water Use[remove]75
- Hydraulic Facilities46
- Dams28
- Archaeological Survey Of India Collections26
- Archaeological Survey Of India: India Office Series26
- Water Supplies25
- Canals20
- Civil engineering20
- Engineering20
- Sennar Dam (Sudan)20
- Dam Construction19
- Land10
- Wetlands9
- Agriculture8
- Transportation7
- Plants6
- Science6
- Boats5