Unknown Author
William A. Hustrulid
Amory B. Lovins
Rozgonyi
Golosinski
International Symposium on Mine Planning and Equipment Selection (2nd 1990 Calgary, Alta.)
B. V. Gokhale
John Loui Porathur
Agence canadienne d'évaluation environnementale.
International Symposium on Mine Planning and Equipment Selection (9th 2000 Athens, Greece)
Jerry E. Green
John L. Thames