TY  - BOOK
ED  - E.U.A. Soil Conservation Service
TI  - Soil taxonomy: : a basic system of a soil classification for making and interpreting soil surveys
T2  - USDA. Agriculture handbook
U1  - 631.44 
PY  - 1975///
CY  - Washington
PB  - S.C.S.
KW  - Suelos
KW  - Clasificación
ER  -