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  1. By: Bayerische Akademie der Wissenschaften. Mathematisch-Physikalische Klasse.
    Publication info: München, Verlag der Bayerischen Akademie der Wissenschaften in Kommission es G. Franzschen Verlags (J. Roth), 1919-1922
    Holding Institution: American Museum of Natural History Library
  2. By: Bayerische Akademie der Wissenschaften. Mathematisch-Physikalische Klasse.
    Publication info: München, Die Akademie, 1918-1923
    Holding Institution: American Museum of Natural History Library