Conference minutes; circulars; lists of participants and invitations; card by Niederl. New Guinea with mission stations, 1:5,000,000, 1930; De Internationale Zendingsraad, by Baron E. von Boetzelaer van Dubeldam, 24 p., Dr., 1932; Lunteren, No. 5, 1932; Correspondence on the establishment of the e. Mission Museum in Zeist Castle, 1933; Statistical data on the RMG Missionange members currently and formerly active in Dutch India, 1948