TY  - BOOK
AU  - Phillipson, John.
ED  - UNESCO
TI  - Methods of study in soil ecology; proceedings of the Paris symposium ..
T2  - Ecology and conservation
U1  - 631.46 
PY  - 1970///
CY  - Paris
PB  - UNESCO
KW  - Suelos
KW  - Ecología
ER  -