| Type |  Book |
| ชื่อเรื่อง | Potertial effects of irrigation practices on crop yields in Grand Valley / V.S. Environmental Protection Agency |
| พิมพลักษณ์ | Ada, Okla : Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency [for sale by the National Technical Information Service], 1979 |
| รูปเล่ม | xiii, 193 p. : ill. ; 29 cm |
| หัวเรื่อง | Evapotranspiration |
| | Irrigation districts --Grand Valley [] |
| | Irrigation research --Colorado --Grand valley [] |
| | Plants --Water requirements [] |