"Franz Rietzsch (1902-1978) was a missionary of the Herrnhuter Brüdergemeine. He served in East Africa from 1931 until 1939. He married Hanna Seibt in 1931." - https://calisphere.org/item/8771e0e51ad09fca53084dedfd7b31a6/, 27.12.2020
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