Pollution survey of the Loiza River and its tributaries /cPerformed by Puerto Rico Aqueduct and Sewer Authority, Production. 

 - [n.p.]  1960. 
 - 5 p.  charts,map. 
<br/><br/> Mimeographed. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution.<br/>Rivers--Puerto Rico<br/>Loiza River, Puerto Rico.