Example 1: Aden postmarks
• Lea, Ruth, Stamps as Witness of History A Guide to Political Philately, Croydon: Filament Publishing Limited, 2018, pages 212-217
• [Lowe, Robson], The Encyclopaedia of British Empire Postage Stamps 1775 – 1950 Volume III The Empire in Asia, London: Robson Lowe Limited, 1951, pages 43-59. Plus Supplement, Part 1.
• Pratt, Richard W and Edward B Proud, The Postal History of British Aden 1839-1967, with additions from MAM Graham and L R Dearlove, Proud-Bailey Co Limited, 1985
• Rossiter, Stuart, and John Flower, The Stamp Atlas, London and Sydney: Macdonald & Co (Publishers) Limited, 1986, pages 223-225
Example 2: T E Lawrence and the breakup of the Ottoman Empire
• Beech, David R, ‘Hejaz: The First Postage Stamps of 1916 and T. E. Lawrence’, The London…