<nowiki>Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; Fred Petter; sindicalista neerlandés; syndicaliste néerlandais; sindikalista nederlandarra; sindicalista neerlandés; Nederlands vakbondsbestuurder (1866-1952); sindicalista neerlandès; sindacalista neerlandese; Dutch trade unionist; sindicalista neerlandês; Dutch trade unionist; نقابي هولندي; sindicalista neerlandés; Dutch trade unionist; Frederik Hermanus Petter; Frederik Hermanus Petter; F.H. Petter</nowiki>
