sponsored by the Western Sections of the Society of Plastics Engineers. sponsored by Western Sections, Society of Plastics Engineers, Inc. sponsored by Central New York Section, Society of Plastics Engineers, Inc. sponsored by the Structural Division of the American Society of Civil Engineers. sponsored by the Power Industries Division of the Institution of Mechanical Engineers. sponsored by the Institution of Mechanical Engineers. sponsored by the Automobile Division of the Institution of Mechanical Engineers. sponsored by the Automobile Divibion of the Institution of Mechanical Engineers. sponsored by the Polyurethane Division, the Society of the Plastics Industry, inc. sponsored by the Tribology Group of the Institution of Mechanical Engineers.