1. IOR/L/E/7/1552, File 7635 Reference (shelfmark): IOR/L/E/7/1552, File 7635 Title: File 7635 Revision of the International Code of Signals - Geographical Section Collection Area: India Office Records and Private Papers Languages: English Date Range: 16 Nov 1928-24 Feb 1930 Extent: 1 file