TY  - BOOK
AU  - Graves,Robert P.
TI  - Ground-water resources in Lajas Valley, Puerto Rico
T2  - Water resources investigations report
U1  - 551.4/9 
PY  - 1991///
CY  - San Juan, P.R.
PB  - Department of the Interior
KW  - Geology
KW  - Puerto Rico
KW  - Lajas
KW  - Local
KW  - Water supply
ER  -