TY  - BK
AU  - Stone,A.A.
AU  - Gulvin,H.E.
TI  - Machines for power farming
SN  - 0-471-82556-5
U1  - 631.37 
PY  - 1977///
CY  - New York (USA)
PB  - John Wiley and Sons, 
ER  -