TY  - GEN
AU  - Ashman , M.R.
AU  - Puri , G.
TI  - Essential soil science: a clear and concise introduction to soil science
SN  - 0632048859
U1  - 631.4 
PY  - 2002///
CY  - U.S.A.
PB  - Blackwell science
KW  - SOIL SCIENCE
ER  -