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|
headwaters : 49 phrases in 16 subjects |
| Advertising | 1 |
| Agrochemistry | 2 |
| Construction | 3 |
| Ecology | 5 |
| Economics | 2 |
| Electronics | 1 |
| General | 1 |
| Geography | 2 |
| Geology | 3 |
| Hydraulic engineering | 1 |
| Hydrography | 7 |
| Hydrology | 2 |
| Makarov | 8 |
| Mining | 1 |
| Technology | 7 |
| Water resources | 3 |