Clean air for Puerto Rico 
Commonwealth of Puerto Rico, Office of the Governor, Environmental Quality Board. 
 - Santurce, P.R.  The Board  1972. 
 - 1 v. (various pagings)  ill., maps  28 cm. 
<br/><br/> "This implementation plan is intended to attain clean air for Puerto Rico and to comply with requirements of the U.S. Clean Air Act"--T.p.  "January 1972"--T.p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air quality management--Puerto Rico.<br/>Aire--Contaminaci'øn--Puerto Rico.<br/>Calidad Ambiental--Gerencia--Puerto Rico.<br/>Air--Pollution--Puerto Rico.