Freddy Litten (Frederick S. Litten), abstracts from "China and intelligence history" (on the Long March)
Braun, Otto. A Comintern Agent in China 1932-1939. Translated by Jeanne Moore. London: C. Hurst, 1982
"Li De yu Zhongguo geming (youguan ziliao)" ("Li De and the Chinese Revolution [Relevant Materials]") by Shi Zhifu; Zhou Wenqi; review in The China Quarterly, No. 118 (Jun., 1989), pp. 373–374, Published by Cambridge University Press on behalf of the School of Oriental and African Studies.
"Otto Brauns frühes Wirken in China (1932-1935)" ("Otto Braun's Early Activity in China (1932-1935") by Freddy Litten. Freddy Litten (Frederick S. Litten), abstracts from "China and intelligence history" (on the Long March)
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