Christie, Agatha . S.O.S. / Agatha Christie; translated by Nirmal Kanti Ghosh. - Kolkata : Patra Book Agency , 1986. - 284p. : maps ; 23cm . NULL ISBN: Rs. 32.00 (Hb) Subjects--Index Terms: BANGLA UPANYAS Dewey Class. No.: 891.443 / CHI/S