TY  - BOOK
AU  - Comber , Norman M. 
TI  - An introduction to the scientific study of the soil
U1  - 631.4 21st ed.
PY  - 1948///
CY  - London
PB  - Edward Arnold
KW  - Soil
KW  - Soil science
N1  - Index: pp 201-06
ER  -