TY  - VF
TI  - Operating tips..
PY  - 0000///[198?]
CY  - [Place of publication not identified] : 
PB  - [Caterpillar], 
KW  - Tractors
N1  - 1. Wheel tractor - scrapers -- 2. Dirt : the quiet thief -- 3. Elevating scrapers
N2  - Operating tips on tractors and scrapers
ER  -