Informe ambiental 1973. 

 - Santurce, P. R.  Junta de Calidad Ambiental  1973. 
 - ii, 191 p.  ill.  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution--Periodicals.--Puerto Rico<br/>Conservation of natural resources--Periodicals.--Puerto Rico
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico
<br/><br/><label>LC Class. No.: </label>TD 180 .5  / P97 1973