The present situation of the acceptance procedure for pit coal fly ash as a binder component in concrete and reinforced concretes in West Germany = Derzeitiger Stand des Zulassungsverfahrens für Steinkohlenflugasche abs Bindemittel Komplonente im Beton und Stahlbeton in der BRD /
Lühr, H. P.
Garston, Watford :  Building Research Establishment, 
1976.
Translated from Betonsteinztg, 1971, (1), 16-21.