Sen, Atul Chandra . Upanishadnavak / Atul Chandra Sen. - 3rd ed / . - Kolkata : Sanskrit Pustak Bahandar , 2005. - 587p. : ill. ; 22cm . Includes bibliographical references and index ISBN: RS150.00 (Hb) Subjects--Index Terms: UPANISHED Dewey Class. No.: 294.59218 / SEN/U