Beisenherz: The Gospel a Godpower, ca. 1912; Beisenherz: The enemies in the Batakmission, 1913; Siegner: Mission Sermon, Acts 10:42-48, no year; Hippenstiel: How does the missionary find entrance among primitive Gentiles? ca. 1912; hipstick: God builds a house on the ruins, n.J.; Becker: Heidenmission is a highly necessary urgent work, after 1923; Schnatbaum: Mission Prayer and Sacrifice Week, 1929; Becker: The Lord gives open doors in the mission, 1936; Borutta: From idolatry to worship, after 1932; Sckär: Die Ältesten in den Ovambogemeinden, o.J.; Sckär: The Poverty of the Gentiles, n.J.; Hippenstiel: The Revival Movement on Nias, and what we can learn from it for our time, c. 1916; Pichler: The Gentiles will walk in your light, n.J.; Siegner: Salvation Desires of the Gentiles, n.J.; Eiffert: What RM achieved in almost 50 years of work in New Guinea, 1927; Schildmann: Bericht über die Arbeit d. RM auf Mentawei, n.J.; Klappert: How does the missionary see the future of the mission and the missionary of the future, 1966