1. IOR/L/E/7/1539, File 2137 Reference (shelfmark): IOR/L/E/7/1539, File 2137 Title: File 2137 Aviation - USA Transport Licences for British and Indian pilots - Mutual recognition of licences by Britain and the United States Collection Area: India Office Records and Private Papers Languages: English Date Range: 28 Mar 1928-9 Jul 1930 Extent: 1 file