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International Organizing Committee, World Mining Congress Canadian Study Tour May 27- June 1 1973: (from left) R.P. Langlois, Director, Ecole Polytechnique de Montreal; M. Mrozowsky (Poland), Chairman of IOC; M. Najberg (Poland); H.R. Rice, Hon. Secretary Treasurer, Canadian National Committee, W.M.C.; B. Lavigueur, President of Ecole Polytechnique de Montreal

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