This paper describes in detail the design of a new concept of an all terrain vehicle. It is new because of its small size, completely flexible rubber tracks, and twin, manually controlled hydrostatic transmissions for fully modulated control of the vehicle. Many configurations for this type of vehicle are outlined and the reasons for selecting the final design are given.
New Concept - Small Two-Track All Terrain Vehicle
Jespersen, H., "New Concept - Small Two-Track All Terrain Vehicle," SAE Technical Paper 690574, 1969, doi:10.4271/690574.