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2. Design aspects relating to the stability of coal mining tunnels;Whittaker,1981
3. Planning roadways from the point of strata mechanics;Goetz;Glückauf,1982
4. The Lower Four Feet floor rocks of South Wales;Afrouz;Colliery Guardian,1976
5. Floor behaviour along longwall roadways;Afrouz;Int. J. Rock Mech. Min. Sci.,1975