Picó, Rafael. <br/><br/>
The geographic regions of Puerto Rico / 
Rafael Picó 
 - Río Piedras, Puerto Rico :  University of Puerto Rico Press,  1950. 
 - xiii, 256 pages :  illustrations; maps 
<br/><br/> Based on thesis-Clark University. 
<br/><br/>Bibliography: p. 233-256. 
<br/><br/><label>LCCN: </label>51026021  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Geography
<br/><br/><label>LC Class. No.: </label>F1958  / .P5 
<br/><br/><label>Dewey Class. No.: </label>917.295