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3. The effects of stress on the flow of gas through Coal Measure strata;Mordecai;Min. Engr,1974
4. Effect of stress on permeability of coal;Somerton;Int. J. Rock Mech. Min. Sci. & Geomech. Abstr.,1975
5. Gas-water capillary pressure in coal at various overburden pressures;Dabbous;Soc. Petrol. Engr J.,1976