Manufactura de puertas y ventanas...  Manufacture of doors and windows...,19- 

 - [San Juan, P. R.]  División de Análisis de Análisis de Salarios y Estudios Ocupacionales  19- 
 - v.  tables. 
<br/><br/> Included appendices and explanatory notes.  Part of text in English. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Doors.<br/>Windows<br/>Building
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico