TY  - BOOK
AU  - Gill, William R.
AU  - Berg, Glen E. Vanden
TI  - Soil dynamics in tillage and traction
SN  - 9788172338039
U1  - 631.51 
PY  - 2013///
CY  - Jodhpur
PB  - Scientific Publishers
KW  - Soil dynamics
KW  - Tillage
KW  - Farm tractors
N1  - Originally published by Agricultural Research Service, United States Department of Agriculture, 1967
ER  -