TY  - BOOK
AU  - Gill,William R.
AU  - Vanden Berg,Glen E.
TI  - Soil dynamics in tillage and traction
U1  - 631.4 
PY  - 0000///19
CY  - Washington.
PB  - United States Department of Agri.
KW  - Soil Dynamics
KW  - Soil Science
ER  -