2620.     PETERS, K. [Progress in the Improving and Utilizing of Coal.]  Ges. Abhandl. Kenntnis Kohle, vol. 12, 1937, pp. 552-568.

        General survey, including the benzine synthesis from coal and water gas.

        ----------.  See abs. 994, 995, 996, 997, 1034, 1035.