1. Theory of Land Locomotion: The Mechanics of Vehicle Mobility;Bekker,1956
2. The Performance of Rigid Cylindrical Wheels on Clay Soil;Uffelmann,1961
3. Theoretical Soil Mechanics;Terzaghi,1956
4. An Investigation into the Validity of Soft Ground Mobility Theories by a Comparison of the Actual and Theoretical Performance of a Family of Rigid Tracks;Wills,1962
5. An Analysis of the Rolling Resistance of Towed Rigid Wheels on Sand;Shaw,1963