AIR-WATER RELATIVE PERMEABILITY STUDIES OF PITTSBURGH AND POCAHONTAS COAL = ETUDES DE PERMEABILITES RELATIVES A L'AIR ET A L'EAU DES CHARBONS DE PITTSBURGH ET DE POCAHONTASREZNIK AA; DABBOUS HK; FULTON PF et al.1974; SOC. PETROLEUM ENGRS J.; U.S.A.; DA. 1974; VOL. 14; NO 6; PP. 556-562; BIBL. 12 REF.Article

THE PERMEABILITY OF COAL TO GAS AND WATER = LA PERMEABILITE DU CHARBON AU GAZ ET A L'EAUDABBOUS MK; REZNIK AA; TABER JJ et al.1974; SOC. PETROLEUM ENGRS J.; U.S.A.; DA. 1974; VOL. 14; NO 6; PP. 563-572; BIBL. 13 REF.Article