1. A terrain-vehicle interaction model for analysis of steering performance of track-laying vehicles;Baladi;U.S. Army Waterways Experiment Station, Technical Report G1-79-6,1979
2. Thermal modeling of terrain surface elements;Balick;U.S. Army Waterways Experiment Station, Technical Report EL-81-2,1981
3. A tentative soil strength prediction system;Collins,1967
4. Influence of water tables on soil moisture and soil strength;Collins,1967
5. Forecasting trafficability of soils;Collins,1971