1. Forest and stream-flow experiment at Wagon Wheel Gap, Colorado;Bates;Mon. Wea. Rev. Sup.,1928
2. Effect of removal of forest vegetation upon water yields;Hoover;Trans. Amer. Geophys. Union,1944
3. Evaporation maps of the United States;Horton;Trans. Amer. Geophys. Union,1943
4. Annual runoff in the United States;Langbein;U. S. Geol. Surv. Circ,1949
5. Natural evaporation from open water bare soil, and grass;Penman;Proc. R. Soc., A,1948