Singh S.P, Koltekar V.Y, . (1986). A.T.B.Of Physics 12th. Nagpur: S Chand and Company Ltd.
Singh S.P, Koltekar V.Y, . 1986. A.T.B.Of Physics 12th. Nagpur: S Chand and Company Ltd.
Singh S.P, Koltekar V.Y, . A.T.B.Of Physics 12th. Nagpur: S Chand and Company Ltd. 1986.
