TY  - RPRT
TI  - Mineral resource assessment of Puerto Rico: Field trip, June 25, 1992
AU  - R.A. Harris
AU  - J. H. Schellekens
AU  - G. E. McKelvey
AU  - D. P. Cox
PY  - 1992
DO  - 10.3133/ofr92567
UR  - https://pubs.usgs.gov/publication/ofr92567
ID  - ofr92567
ER  -