TY  - RPRT
TI  - Geologic and hydrologic data collected at test holes NC-6 and NC-11, Hatillo and Isabela, northwestern Puerto Rico
AU  - Jesús Rodríguez-Martínez
AU  - John L. Hartley
PY  - 1994
DO  - 10.3133/ofr93465
UR  - https://pubs.usgs.gov/publication/ofr93465
ID  - ofr93465
ER  -