Jan. A.B. Jongeneel, Philosophy, Science, and Theology of Mission in the 19th and 20th Centuries. A Missiological Encyclopedia. Part II. Missionary Theology. Frankfurt am Main:
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Peter Lang, 1997, xxii + 428 pages. (Studien zur interkulturellen Geschichte des Christentums, Band 106). DM 118, ISBN 3-631-48313-7