TY  - BOOK
AU  - Phillipson, John,
ED  - UNESCO.
ED  - International Biological Programme.
TI  - Methods of study in soil ecology
U1  - 577.57 
PY  - 1970///]
CY  - [Paris]
PB  - Unesco
KW  - Soil ecology
N1  - Held in Nov. 1967; English and/or French; Includes bibliographical references
ER  -