MSHA'S REVISED QUARTZ ENFORCEMENT PROGRAM; A WORKING HYPOTHESIS ON HOW SILICA AND SILICA SURFACE MAY CAUSE SILICOSIS AND CWP; WETTING CHARACTERISTICS OF PARTICLES AND THEIR SIGNIFICANCE IN DUST ABATEMENT; ELECTRON SPIN RESONANCE DETECTION OF REACTIVE FREE RADICALS IN FRESH COAL DUST AND QUARTZ DUST AND ITS IMPLICATION TO PNEUMOCONIOSIS AND SILICOSIS; NUMERICAL TECHNIQUE FOR CALCULATING THE EQUIVALENT AERODYNAMIC DIAMETER OF PARTICLES; MINIRAM PERFORMANCE IN THE COAL MINING ENVIRONMENT; MEASUREMENTS OF RESPIRABLE DUST CONCENTRATIONS BY USING VARIOUS SAMPLERS IN UNDERGROUND COAL MINES; THEORETICAL AND EXPERIMENTAL STUDIES ON DUST TRANSPORT IN MINE AIRWAYS: A COMPARATIVE ANALYSIS; DETERMINING THE SIZE DISTRIBUTION OF COAL DIESEL AEROSOL MIXTURES WITH THE MICROORIFICE UNIFORM DEPOSIT IMPACTOR; FRACTURE MODE AND LOADING RATE INFLUENCES ON THE FORMATION OF RESPIRABLE SIZE FRAGMENTS ON NEW FRACTURE SURFACES; CORRELATION OF FRAGMENT SIZE DISTRIBUTION AND FRACTURE SURFACE IN COAL CUTTING UNDER VARIOUS CONDITIONS; STATISTICAL ANALYSIS OF THE ELEMENTAL CHARACTERISTICS OF AIRBORNE COAL MINE DUST; VARIATION IN MINERAL AND ELEMENTAL COMPOSITION OF RESPIRABLE COAL MINE DUSTS BY WORKER LOCATION AND COAL SEAM.