Issued by The National Federation of Gas Coke Associations, Hardback, 88 pages, 1942. (Small Blue Book, Good Condition).

This publication is issued jointly by the National Federation of Gas Coke Associations, the British Hard Coke Association and the South Wales Anthracite and Dry Coal Committee, in anticipation that it may contribute towards the more efficient operation of producer gas plants and help in the national drive for fuel economy.