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Cusack C. Petsche, Johanna J. M. 2015. Gurdjieff and Music: The Gurdjieff/de Hartmann Piano Music and its Esoteric Significance. Leiden and Boston, MA: Brill. xvi + 279pp. Ebook. US$130. E-ISBN: 9789004284449. Hbk. US$142.00. ISBN-13: 96789004284425. FIRN [Internet]. 2016 Nov. 7 [cited 2024 Nov. 21];11(1):121-2. Available from: https://journal.equinoxpub.com/FIR/article/view/13004