Carter, Oliver Reuben  1923- <br/><br/>
Soil survey, area de Valle de Lajas, Lajas Valley area, Puerto Rico. 
[Report by Oliver R. Carter; Survey by Oliver R. Carter and others. 
 - Washington]  U.S. Dept. of Agriculture, Soil Conservation Service  1965. 
 - ii, 170 p.  illus., maps (part fold. col.) 
 - [United Soil Conservation Service] Soil survey  ser. 1961, no. 23 .
<br/><br/> Cover title.  "Literature cited" : p. 170. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil-survey--Puerto Rico.<br/>Soil-survey--Puerto Rico--Lajas Valley area.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Soil.