by HAPPE,WILHELM,DR, JAKOB,SCHLADETSCH,HANS
Year of Publication 15.04.1973

by LOEFFLER,WILHELM,DR, HAPPE,WILHELM,DR
Year of Publication 08.07.1971

by HAPPE,WILHELM,DR, HEITZER,ERICH,DR
Year of Publication 01.07.1971

by HAPPE,WILHELM,.DR, JAKOB,.SCHLADETSCH,HANS
Year of Publication 24.06.1971

by HAPPE,WILHELM,DR, MATTERSTOCK,KARL,DR, GUENTHER,DIETER,DR
Year of Publication 15.03.1972

by HAPPE WILHELM DR
Year of Publication 01.12.1955

by HAPPE WILHELM DR
Year of Publication 22.09.1955

by HAPPE WILHELM DR
Year of Publication 26.11.1953

by HANSJOERG VOLLMANN,.DR, DIETER GUENTHER,.DR, WILHELM HAPPE,.DR
Year of Publication 03.12.1970

by WEIHSERT,JOSEF,DR, HAPPE,WILHELM,DR, HUSS,RICHARD,DR, SIEBERT,ARTHUR,DR
Year of Publication 15.06.1956

by HAPPE,WILHELM,DR, HOEROLDT,ERNST,DR
Year of Publication 03.06.1971

by HAPPE,WILHELM,DR, FESTER,WALTER,DR
Year of Publication 03.06.1971

by GERHARD WECKLER,DR, WILHELM HAPPE,DR
Year of Publication 12.12.1968

by HAPPE,WILHELM,DR, GIES,HELMUT,DR
Year of Publication 15.06.1962

by HAPPE,WILHELM,DR, WECKLER,GERHARD,DR, RITTNER,SIEGBERT,DR
Year of Publication 15.03.1972

by HAPPE,WILHELM,DR, LUKASCZYK,GERHARD,DR, HOEROLDT,ERNST,DR
Year of Publication 24.02.1972

by HAPPE,WILHELM,DR, HOYER,HANS,DR, KEIL,GUENTHER,DR
Year of Publication 24.06.1971

by GERHARD WECKLER,DR, WILHELM HAPPE,DR, SIEGBERT RITTNER,DR
Year of Publication 02.07.1970

by HANS HOYER,DR, WILHELM HAPPE,DR, FRANZ JAKOB,DR
Year of Publication 22.01.1970

by HAPPE,WILHELM,DR, HEYNA,JOHANNES,DR, HOYER,ERNST,DR
Year of Publication 31.07.1964