Time, inc.,

Water Well Journal Pub. Co.,

American Water Resources Assn.

American Geophysical Union,

U.S. Dept. of the Interior, Bureau of Reclamation ; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,

Agriculture Extension Service, University of Wyoming,

Praeger

University Microfilms,

Dutton

University of Wyoming,

U.S. Dept. of the Interior, Geological Survey ; National Technical Information Service, distributor,

Coward-McCann