WRD Publications Guide Volume 1: Publications Policy and Text Preparation, rev. Alt, Darwin F.; Iseri, Kathleen T., U.S. Geological Survey Water Resources Division, 1986.
Ground Water along Rio Bucana at Ponce, Puerto Rico and the effects of a
proposed floodway on ground-water quality, by Bennett, Gordon D., U.S. Department of the Interior--Geological
Survey--Water-Resources Bulletin 11, 1972.
Surface Water Records of Colorado, U.S. Department of the Interior--Geological Survey--Water Resources Division, 1961.
Surface Water Records of Colorado, U.S. Department of the Interior--Geological Survey--Water Resources Division, 1962.
Surface Water Records of Colorado, U.S. Department of the Interior--Geological Survey--Water Resources Division, 1963.
Water Quality Records in Colorado, U.S. Department of the Interior--Geological Survey, 1964.
WATER RESOURCES OF THE PONCE AREA, PUERTO RICO, McClymonds, Neal E., Water-Resources Bulletin 14, U.S. Geological Survey, 1972.
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U.S. Department of the Interior
U.S. Geological Survey