TY  - BOOK
AU  - Ashman,M.R.
AU  - Puri ,G
TI  - Essential Soil Science: a clear and concise  introduction to soil science 
SN  - 9780632048854
U1  - 631.4 23
PY  - 2002///
CY  - U.S.A
PB  - Blackwell publishing company
KW  - agriculture
N1  - Includes: index (p.190-198)
ER  -