United States Soil Conservation Service. University of Puerto Rico Mayaguez Campus College of Agricultural Sciences. text bibliography pr Washington, D.C Soil Conservation Service 1977 monographic eng

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169 p. ill., maps United States Department of Agriculture, Soil Conservation Service ; in cooperation with the College of Agricultural Sciences, University of Puerto Rico, Mayaguez Campus. Soils Puerto Rico Arecibo Maps Soils Puerto Rico Arecibo Area Maps Soil surveys Puerto Rico Arecibo Area 820805 20160527200738.0 157310