Swami Chinmayananda Discourses on Kathopnishad / Swami Chinmayananda . - New Delhi : Sheila Puri, 1960 250 p. ; 23 cm. During 100day Upanishad Gyana Yagna Poona Dec 31,1951-April 8,1952.61 day Upanishad Gyana Yagna New Delhi September 24,1954- November 26,1954. 31 Day Upanishad Gyana Yagna Mount Road Madras. July7-August7,1957 * Upanishad