Personal Assistant to General Secretaries: Omer Becu, Pieter de Vries and Hans Imhof. Assistant General Secretary of the International Transport Workers' Federation, 1967-1977. General Secretary of the ITF, 1977-1993. Biographical notes. Profiles from ITF Journal, Jun-Jul 1966; Seatrade, Sep 1977. Article in Marine Week about flags of convenience, 18 Nov 1977.