00317nam a2200097Ia 4500008004100000100001400041245004900055260008000104650001700184700001800201220216s9999    xx            000 0 und d  aSmith W R 0aNature and activity of carbon black surfaces  bProceedings of the 2nd Rubber Technology Conference, London, 1948; p403-413  aCarbon black  aSchaeffer W D