Canada. Mines Branch.
V. E. McKelvey
Thomas J. Scott
John L. Burnett
Albert F. Ellis
National Institute for Occupational Safety and Health. Division of Technical Services.
Energy, Mines and Resources Canada. Mineral and Earth Sciences Program.
Unknown Author
Vladimir Boscak
William F. Stowasser
Maslyn Williams
Jean Guillemin
Rotem Amfert Negev Ltd
Bourane Zenaïdi Karray
A. N. Gray
Israel) Simpozyon be-khimiyah shimushit uve-handasah khimit (1st 1971 Aiyelet Hashaḥar