Union membership of Alida J AlbertsUnion membership of Cornelis J.J. HoogendorpUnion membership of Piet J.M.P. CapelUnion membership of Gijsbertus Antonius BeumerUnion membership of Hendrikus VeerkampUnion membership of Franciscus Cornelis August SchneiderUnion membership of Simon Wilhelmus B. LangenhoffUnion membership of Johannes J.L. SpiekermanUnion membership of Johannes J. HoogendorpUnion membership of Willem J. HeystUnion membership of Gerardus H. CoelenUnion membership of Everardus Bernardus AlbertsUnion membership of Karel Marinus KropUnion membership of Petrus Jac. CoelenUnion membership of Daniël LangenhoffUnion membership of Johannes Casparus de JongUnion membership of Petrus Jacobus Krop