Grant nos. 14-08-001-G895 and 14-08-0001-G1006; project no. 06.
"Research ... financed in part by the U.S. Department of the Interior, Geological Survey and Bureau of Reclamation, through the Colorado Water Resources Research Institute in cooperation with the U.S.D.A. Agricultural Research Service."
"June 1987."
Bibliography: p. 21.