Saraswati Basics of Contours & survey Map. A Workbook for icse students +Pull out topographical sheets G43S7 and G43S10. [total 12 sheets(10 sheets have map printed on both sides and remaining 2 sheets have 4+4 map printed. Thus total 28 maps)] It is completely new not even used once Whitener has been used on the first page just to cover name.