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Geology of the Cayey quadrangle, Puerto Rico
1 map : color ; 69 x 66 cm., on sheet 94 x 138 cm., folded in envelope 30 x 24 cm.
by Henry L. Berryhill, Jr. and Lynn Glover, 3d ; prepared [by the United States Geological Survey] in cooperation with the Economic Development Administration of the Commonwealth of Puerto Rico.
Miscellaneous geologic investigations ; map I-319