Román Más, Angel. <br/><br/>
Compilation of water-quality data for the north coast limestone aquifers, Puerto Rico, 1951 to 1987 
by Angel Román-Más and Orlando Ramos-Ginés. 
 - San Juan, P.R.  Geological Survey  1988. 
 - vi, 133 p.  maps. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--Measurement.--Puerto Rico
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Water.