The Relationship between engine oil viscosity and engine performance : symposium / collected and collated by R. M. Stewart, T. W. Selby ; symposium chairmen, T. F. Lonstrup ... [et al.] ; sponsored by Society of Automotive Engineers, inc., and American Society for Testing and Materials. (ASTM STP ; 621, 621-S1)
The Relationship between engine oil viscosity and engine performance : symposium / collected and collated by R. M. Stewart, T. W. Selby ; symposium chairmen, T. F. Lonstrup ... [et al.] ; sponsored by Society of Automotive Engineers, inc., and American Society for Testing and Materials.