DISTRIBUTION AND SIZE OF GOLD PARTICLES IN THE WITWATERSRAND REEFS AND THEIR EFFECTS ON SAMPLING PROCEDURES.HALLBAUER DK; JOUGHIN NC.1974; IN: GEOL. MIN. METALL. SAMPLING. PROC. MEET. INST. MIN. METALL.; LONDON; 1972, 1973; LONDON INST. MIN. METALL.,1974, P. 110 A 119Miscellaneous

ROCK CONDITIONS AROUND DEEP-LEVEL STOPES, AND THEIR INFLUENCE ON THE DEVELOPMENT OF MECHANIZED MINING TECHNIQUES = LES PROPRIETES DES ROCHES AUTOUR DES ZONES D'ABATTAGE A DES NIVEAUX PROFONDS ET LEUR INFLUENCE SUR LE DEVELOPPEMENT DES TECHNIQUES D'EXPLOITATION MINIERE MECANISEESATKINS AR; JACKSON DHP; JOUGHIN NC et al.1982; CONGRESS OF THE COUNCIL OF MINING AND METALLURGICAL INSTITUTIONS. 12/1982/JOHANNESBURG; ZAF; MARSHALLTOWN: SOUTH AFR. INST. MINING METALLURGY; DA. 1982; VOL. 1; PP. 311-317; BIBL. 14 REF.; 1 TAB. ; TABL./ILL.Conference Paper