Soil survey, area de Valle de Lajas, Lajas Valley area, Puerto Rico.
Carter, Oliver Reuben 1923-
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 .
Cover title. "Literature cited" : p. 170.
Soil-survey--Puerto Rico.
Soil-survey--Puerto Rico--Lajas Valley area.
Puerto Rico--Soil.
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 .
Cover title. "Literature cited" : p. 170.
Soil-survey--Puerto Rico.
Soil-survey--Puerto Rico--Lajas Valley area.
Puerto Rico--Soil.