1. The geology and related aspects of coal and gas outburst in the Gwendraeth Valley;Barker-Read,1981
2. The gas-dynamic behaviour of Coal Measures strata with particular reference to west Wales outburst-prone seams;Barker-Read,1984
3. A special geological report on the problem of outbursts of coal and gas;Godden;Natl. Coal Board South Wales Geol. Serv.,1981
4. Outbursts of coal and gas of the anthracite area of South Wales;Hughes,1973
5. Outbursts of Coal and Gas and the Structure of Coal;Ettinger,1969