1. IOR/L/E/7/1366, File 5108 Reference (shelfmark): IOR/L/E/7/1366, File 5108 Title: File 5108 Wireless - reciprocal recognition of certificates of proficiency on Radio-telegraphy Collection Area: India Office Records and Private Papers Languages: English Date Range: 22 Nov 1924-3 Mar 1936 Extent: 1 file