PPG en Puerto Rico. 

 - Ponce, Puerto Rico  1975. 
 - volumes :  illustrations (some color) ;  28 cm.  
<br/><br/><label>Subjects--Corporate Names: </label><br/>PPG industries Caribe.--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Periodicals.