Raisinghania, M.D. Advanced differential equations - 19th - New Delhi : S Chand And Company Limited, 2021 - xxxii, 1484p. ISBN: 978-93-5253-589-7 Subjects--Topical Terms: Picard's Iterative Method | Simultaneous differential | Power Series | Beta and Gamma Functions Dewey Class. No.: 515.35 R13A