TY  - BOOK
AU  - Smathers, Robert L.
AU  - Willetto, Gayles.
TI  - The cost of owning and operating farm machinery in the pacific northwest
T2  - PNW
U1  - 631.3 
PY  - 1989///
CY  - Moscow, Idaho
PB  - Pacific Northwest Cooperative Extension
KW  - Mecanización agrícola
N1  - D52-242
ER  -