1. Ride comfort for tractor operators. I: A review of existing information;Matthews;J. agric. Engng Res.,1964
2. Ride comfort for tractor operators. II: Analysis of ride vibrations on pneumatic-tyred tractors;Matthews;J. agric. Engng Res.,1964
3. Some measurements and power spectra of runway roughness;Walls,1954
4. Statistical description of the micro-profile of automotive roads;Pevmer;J. Terramech.,1964
5. Die Unebenheiten landwirtschaftlicher Fahrbahnen als Schwingungserreger landwirtschaftlicher Fahrzeuge;Wendeborn,1964