United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the Regents of the University of California (Agricultural Experiment Station) and the United States Department of the Interior, Bureau of Land Management
United States Department of Agriculture, Soil Conservation Service, in cooperation with United States Department of Agriculture, Forest Service, and University of California Agricultural Experiment Station
United States Department of Agriculture, Soil Conservation Service in cooperation with The Regents of the University of California Agricultural Experiment Station
United States Department of Agriculture, Soil Conservation Service ; in cooperation with the Regents of the University of California (Agricultural Experiment Station)
[by Lawrence E. Welch ... and others] ; United States Department of Agriculture, Soil Conservation Service, in cooperation with the University of California Agricultural Experiment Station