ed., The Encyclopedia of Taoism (London: Routledge, 2008), 915–916. Harper, Damian ed. China. London: Lonely Planet, 2002. Kohn, Livia. "Laojun Yinsong Jiejing." in Fabrizio Pregadio, ed., The Encyclopedia of Taoism (London: Routledge, 2008), 609–610. Kohn, Livia. "Louguan Pai." in Fabrizio Pregadio, ed., The Encyclopedia of Taoism (London: Routledge, 2008), 710–711. Kohn, Livia. "The Northern Celestial Masters." in Livia Kohn ed., Daoism Handbook (Leiden: Brill, 2000), 283–308. Kohn, Livia. "Xisheng Jing." in Fabrizio Pregadio, ed., The Encyclopedia of Taoism (London: Routledge, 2008), 1114–1115. Kohn, Livia and Michael LaFargue eds. Lao-Tzu and the Tao-Te-Ching. Albany: State University of New York, 1998. Mather, Richard. "K'ou Ch'ien-chih and the Taoist Theocracy at the Northern Wei court 425-451" In Facets of Taoism, edited by Holmes Welch and Anna Seidel, 103–133. New Haven: Yale University, 1979. Robinet, Isabelle. Taoism: Growth of a Religion. Stanford: Stanford University, 1997. External links A Biography of Kou Qianzhi Taoist schools Northern Wei Way of the Celestial Masters Theocracies