The four-year economic and social development plan of Puerto Rico 
1969-1972, / Prepared by the Planning Board in collaboration with the agencies of the government. 
 - [San Juan, P.R.]  Office of the Governor  1968. 
 - xiv, 241 p.  tables. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Development plans--Puerto Rico.<br/>Regional economic development--PuertoRico.