1. Random Vibration in Mechanical Systems;Crandall,1963
2. Random Signals and Noise;Davenport,1958
3. A rational method for predicting alighting gear dynamic loads;Ferguson;ASD TDR-62 555,1963
4. Progress and recommended research activity on the runway roughness problem;Houbolt,1958
5. Runway roughness in the aeronautical field;Houbolt;J. Air Transp. Div. Am. Soc. civ. Engrs,1961