Christopher J. Cowton
Schneider, George Jr
Gopal S. Upadhyaya
Conference on Materials for Metal Cutting (1970 Scarborough, England)
John English
Graham T. Smith
Masao Kogure
International Cemented Carbide Conference Chicago 1971.
Drăghici, Gherman.
Cemented Carbide Conference Dearborn, Mich. 1973.
Wallace W. Roepke
Wallace W Roepke
Chōkō Kōgu Kyōkai (Japan)