TY  - GEN
AU  - Carleton, Walter M
AU  - Liljedahl, John B
AU  - Turnquist, paul K
TI  - Tractors and their power units
U1  - 629.  225 LIL 
CY  - U S A, John Wiley & Sons INC
KW  - Tractors/thermodynamic principles
ER  -