Reference work
Oskar E. Bernhardt and the Grail Movement
Zdeněk Vojtíšek
Documents the 1929 turning-point expectation, subsequent disappointment, differing later branches, and dispute about the 1949–1950 edition of the canonical book.
Bibliography entry · Source text is available through the cited link below.
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Edition and location
Web edition identified above
Core Teachings; Millennialism and Ethnocentrism; Development after Founder's Death