sponsored by the Chicago Section and the Recycling Division of the Society of Plastics Engineers. sponsored by Chicago Section-Vinyl Division Society of Plastics Engineers. sponsored by the Tribology Group and The Automobile Division of the Institution of Mechanical Engineers. sponsored by the Mid-Hudson Section Society of plastics Engineers. sponsored by the Philadelphia Section, Society of Plastics Engineers. sponsored by Engineering Properties and Structure Division and Akron Section Society of Plastics Engineers. sponsored by the Mechanical Working and Steel Processing Division of the Iron and Steel Society, Inc. sponsored by the Qualifications Education and Training Division of the Institution of Mechanical Engineers ... [et al.]. sponsored by the Mechanical Working and Steel Processing Division of the Iron and Steel Society. sponsored by the Power Industries Division of the Institution of Mechanical Engineers.