00373nam a2200121Ia 4500008004100000245011200041260000900153500002900162650000800191650002500199650001900224650000800243220217s9999    xx            000 0 und d 0aMethods for testing tar and bituminous materials: Determination of mineral matter. (Ash). (First Revision).  c1978  aStandard number: IS 1217  aAsh  aBituminous materials  aMineral matter  aTar