The British Coal Utilisation Research Association: Monthly bulletin 1956 Brooks, Benjamin T. (1950): The chemistry of the non benzenoid hydrocarbons Burkhardt, Charles H. (1951): Domestic oil burners - installation and servicing Chemical apparatus in the U.S.A. Published by the Organisation for European Economic Co-operation Paris (1952) Chemical engineering progress, volum 47 1951. American Institute of Chemical Engineers