TY  - BOOK
ED  - E.U.A. Soil Conservation Service
TI  - Procedures for collecting soil samples and methods of analysis for soil survey
T2  - Soil survey investigations report
U1  - 631.4072 
PY  - 1984///
CY  - [Washington, D.C.?]
PB  - Soil Conservation Service
KW  - Muestreo de suelos
KW  - Suelos
KW  - Manuales de laboratorio
ER  -