Agriculture Extension Service, University of Wyoming,

U.S. Dept. of Agriculture,

Ortho Books,

U.S. Dept. of the Interior. Bureau of Reclamation,

Houghton Mifflin,

Water Resources Research Institute, University of Idaho,

USDA Agricultural Research Service, High Plains Grassland Research Station ; Agricultural Experiment Station, University of Wyoming,

Utah Agricultural Experiment Station, Utah State University,

Doane College,

Utah Water Research Laboratory, College of Engineering, Utah State University,

s.n.,

Water Research Center,