A pollution study of Matilde River 
by Rafael Muñoz Candelario. 
 - Santurce, P.R.  1970. 
 - 38 p.  charts. 
<br/><br/> Mimeographed. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution.<br/>Rivers--Puerto Rico
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Río Matilde Ponce, P.R..