Puerto Rico 
by R.C. Roberts. 
 - Washington, D.C.  Department of Agriculture, Bureau of Plant Industry  19- 
 - 503 p.  ill. maps. (pt. fold) photos, tables. 
 - Serie : 1936-  no.8, Soil survey .
<br/><br/> Published with the cooperation of University of Puerto Rico Agricultural Experiment Station.  At head of title : Soil Survey.  Cover title.  Includes explanatory notes. 
<br/><br/>Bibliographical references included in Literature cited (p. 492-495) 
<br/><br/><label>LCCN: </label>aa 28000456  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil surveys--Puerto Rico.<br/>Agriculture--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico