
Roger B. (Roger Bradbury) Whitman
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Motor-car principles; the gasoline automobile
Discover the early 20th-century secrets of how gasoline engines power automobiles, from basic principles to intricate designs.
By Roger B. (Roger Bradbury) Whitman

Tractor Principles The Action, Mechanism, Handling, Care, Maintenance and Repair of the Gas Engine Tractor
Unlock the secrets of early 20th-century gas tractor engineering, where mastering the mechanics is the key to conquering the fields.
By Roger B. (Roger Bradbury) Whitman