Hill, E.B. <br/><br/>
An economic background for agricultural research in Puerto Rico. 

 - Río Piedras, P.R.  1939. 
 - 61 p. 
<br/><br/>Bibliographical references included in "Literature cited". 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects.<br/>Agricultural research--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Economic aspects.<br/>Puerto Rico--Agriculture.