Proceedings of... : held on September 11 & 12, 1980 at the Hyatt Regency Hotel, Houston, Texas / edited by P. W. Harben. Worcester Park, Surrey ; New York : Metal Bulletin Group, c.1981. 107 p. : ill.
The Mining year book. 1st(1887)-85th(1971) London, W.E. Skinner [etc.] v. : maps (part fold.) Annual.
Mining international year book. = 1979-1982. London : Financial Times Business Publications, c1979-1981. v. : ill. Annual.
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Updated 22 April 2013