21. IOR/V/27/760/21 Reference (shelfmark): IOR/V/27/760/21 Title: Possmann, Julius, Official history of the Persian Gulf telegraph cables. Karachi: Mercantile Press, 1889 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1889 Extent: 1 volume
22. IOR/V/27/760/22 Reference (shelfmark): IOR/V/27/760/22 Title: India. Indo-European Telegraph Department, Official history of the Mekran telegraph line from Karachi to Jask. Karachi: Mercantile Press, 1895 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1895 Extent: 1 volume
23. IOR/V/27/760/23 Reference (shelfmark): IOR/V/27/760/23 Title: Evans, L, Report on the various systems of wireless telegraphy. January 1913. Simla, 1914 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1914 Extent: 1 volume
24. IOR/V/27/760/24 Reference (shelfmark): IOR/V/27/760/24 Title: India. Telegraph Department, Technical instruction on wireless telegraphy as applied to stations in India. Calcutta, 1915 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1915 Extent: 1 volume
25. IOR/V/27/760/25 Reference (shelfmark): IOR/V/27/760/25 Title: Crawford, M N and Purssell, R S, A report on some features of the telephone business in America and on the organisation of the British Post Office for the administration of the telephone service. Simla, 1922 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1922 Extent: 1 volume
26. IOR/V/27/760/26 Reference (shelfmark): IOR/V/27/760/26 Title: India. Posts and Telegraphs Department, Particulars of radio-telegraph stations in India and the Persian Gulf. 3rd edition, August 1923. Simla, 1923 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1923 Extent: 1 volume
27. IOR/V/27/760/27 Reference (shelfmark): IOR/V/27/760/27 Title: India. Posts and Telegraphs Department, Particulars of radio-telegraph stations in India. 17th edition, January 1938. New Delhi, 1938 Scope & Content: For official use only Collection Area: India Office Records and Private Papers Languages: English Date Range: 1938 Extent: 1 volume
28. IOR/V/27/760/28 Reference (shelfmark): IOR/V/27/760/28 Title: India. Posts and Telegraphs Department, Particulars of radio-telegraph stations in India. 18th edition, July 1939. New Delhi, 1939 Scope & Content: For official use only Collection Area: India Office Records and Private Papers Languages: English Date Range: 1939 Extent: 1 volume
29. IOR/V/27/760/29 Reference (shelfmark): IOR/V/27/760/29 Title: Universal Postal Union, Universal Postal Convention, London, 28 June 1929. London, 1930 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1930 Extent: 1 volume
30. IOR/V/27/760/30 Reference (shelfmark): IOR/V/27/760/30 Title: Universal Postal Union, Universal Postal Convention, Buenos Aires, 23 May 1939, together with the detailed regulations for its execution. London, 1940 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1940 Extent: 1 volume