| 000 | nam a22 4500 | ||
|---|---|---|---|
| 020 | _a | ||
| 245 | _aIrrigation districts in China | ||
| 260 |
_aBeijing _bagricultural publishing house _c1991 |
||
| 710 | _aMinsitry of water resources Department of Rural Irrigation Drainage & Soil Conservation Ministry of water resources | ||
| 942 | _c22 | ||
| 999 |
_c6629 _d6629 |
||