TY  - RPRT
TI  - Sand-sized heavy-mineral distributions in offshore insular shelf sediments of north-central Puerto Rico
AU  - Gretchen Luepke
AU  - L. J. Poppe
PY  - 1993
DO  - 10.3133/ofr93341
UR  - https://pubs.usgs.gov/publication/ofr93341
ID  - ofr93341
ER  -