by VAN HELDEN, ROBERT, BOULTON, JEFFERY JOHN KENDALL, AMSTERDAM, NL, VERBRUGGE, PIETER ADRIAAN, KRAMER, PETRUS ANTHONIUS
Year of Publication 10.03.1988

by BAARDMANN,FRANK,NL, VAN HELDEN,ROBERT,NL, SYRIER,JOHANNES L.M.,NL
Year of Publication 15.02.1988

by BAARDMANN FRANK,NL, VAN HELDEN ROBERT,NL, SYRIER JOHANNES L.M.,NL
Year of Publication 16.07.1987

by HELDEN ROBERT VAN, JONKHOFF TAEKE
Year of Publication 27.10.1966

by VAN HELDEN,ROBERT,NL, SYRIER,JOHANNES L. M.,NL, BAARDMAN,FRANK,NL
Year of Publication 28.04.1987

by ENGEL, WILLEM FREDERIK, KRIJGER, PIETER, HELDEN, ROBERT VAN, ALKEMA, HENK JOHAN
Year of Publication 06.02.1975

by ENGEL, WILLEM FREDERIK, KRIJGER, PIETER, HELDEN, ROBERT VAN, ALKEMA, HENK JOHAN
Year of Publication 20.06.1974

by ROBERT VAN HELDEN, ELLIOT BERGMAN, DIRK E. POEL, NANNO FEKKES, JACK WOOD, DIRK MEDEMA
Year of Publication 25.04.1972

by HELDEN,ROBERT VAN, BERGMAN,ELLIOT, FEKKES,NANNO, WOOD,JACK, MEDEMA,DIRK, EVERARD POEL,DIRK
Year of Publication 31.12.1971

by ROBERT VAN HELDEN, ELLIOT BERGMAN, DIRK E. POEL, NANNO FEKKES, JACK WOOD, DIRK MEDEMA
Year of Publication 24.08.1971

by HENK J. ALKEMA, ROBERT VAN HELDEN, WILLEM F. ENGEL, PIETER KRIJGER
Year of Publication 05.01.1971

by ROBERT VAN HELDEN, HENK JOHAN ALKEMA, WILLEM FREDERIK ENGEL, PIETER KRIJGER
Year of Publication 17.09.1969

by FEKKES,NANNO, BERGMANN,ELLIOT, VAN HELDEN,ROBERT, WOOD,JACK, MEDEMA,DIRK, EVERARD POEL,DIRK
Year of Publication 04.09.1969

by SLAUGH, LYNN HENRY, HELDEN, ROBERT VAN, AMSTERDAM, NL, VINCKEN, JOZEF JOHAN HUBERT MARIA, ROTTERDAM, NL
Year of Publication 10.11.1983

by HELDEN, ROBERT VAN, AMSTERDAM, NL, MONTIJN, PAULUS PIETER, HADDOCK, ERNEST, SHEERNESS, SHEPPEY, KENT, GB
Year of Publication 06.10.1983

by ROBERT VAN HELDEN, GEERTRUIDA M. LA ROIJ, ARNE P. TER BORG
Year of Publication 07.03.1961

by HADDOCK,ERNEST,GB, VAN HELDEN,ROBERT,NL, MONTIJN,PAULUS P.,NL
Year of Publication 31.01.1980

by HELDEN, ROBERT VAN, AMSTERDAM, NL, MULDER, ALBERTUS JOHAN, AMSTERDAM, NL, HAWES, JOHN ERNEST, SITTINGBOURNE, KENT, GB
Year of Publication 26.07.1984

by JOHAN MULDER,ALBERTUS, VAN HELDEN,ROBERT
Year of Publication 14.08.1975

by JOHAN HEISZWOLF,GERARD, VAN HELDEN,ROBERT
Year of Publication 27.03.1975