Briggs, Reginald Peter creator Puerto Rico Dept. of Industrial Research. Geological Survey (U.S.) text abstract or summary dcu Washington, D.C U.S. Geological Survey 1964 monographic eng

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1 map 38 x 128 cm., on sheet 83 x 140 cm., folded in envelope 30 x 24 cm. by Reginald P. Briggs ; prepared in cooperation with the Commonwealth of Puerto Rico, Economic Development Administration, Industrial Research Department. Inset: Map showing relative accuracy of parts of the geologic map. W0680000 W0651500 N0183000 N0175500 nwpr--- (W 68⁰00'--W 65⁰15'/N 18⁰30'--N 17⁰55'). Scale 1:240,000 Geology Puerto Rico Maps Maps Puerto Rico 1964 Puerto Rico Maps RBN 851022 20240725062703.0 130648