1. Paddy Rice Cultivation in China;Ding,1961
2. Crop water requirements;Doorenbos;FAO Irrigation and Drainage Paper No. 24,1977
3. Guidelines for Prediction Crop Water Requirements;Doorenbos,1977
4. Environmental quality standard for surface water;EPA of P. R. China,1988
5. Studies on ecological engineering land treatment system for wastewater from west Shenyang area;Gao,1986