sponsors, California Division of Mines and Geology [and others] ; editor and chairman of organizing committee, Walter W. Hays ; compiled by Pamela D. Andriese
a joint proposal by: Division of Hydrologic Sciences, Desert Research Institute and Nevada District Office, Water Resources Division, U.S. Geological Survey
prepared in cooperation with the Puerto Rico Department of Natural Resources, Puerto Rico Aqueduct and Sewer Authority, Puerto Rico Environmental Quality Board, Puerto Rico Department of Agriculture, and Puerto Rico Electronic Power Authority