DIN EN 29454-1:1994 Soft soldering fluxes; classification and requirements; part 1: classification, labelling and packaging (ISO 9454-1:1990); German version EN 29454-1:1993
DVS 1191-2002 Training and testing of personnel in the field of welding, cutting and coating (FTB) DVS and DVS-PersZert® Directory of approved educational institutions