TY  - BOOK
AU  - Gierbolini, Robert E.
ED  - United States
TI  - Soil survey of the Ponce area of southern Puerto Rico
PY  - 1979///]
CY  - [Washington]
PB  - Soil Conservation Service
KW  - Soil surveys
KW  - Puerto Rico
KW  - Ponce Region
KW  - Maps
KW  - Local
KW  - Soil
ER  -