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3. Symp. on Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles, General Motors;Hucho,1978
4. Symp. on Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles, General Motors;Mason,1978
5. Symp. on Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles, General Motors;Morel,1978