1. File 3414/1906 Pt 5 'Telegraphs:- N. Persia. Tehran-Khanikan line; Tehran-Shahrud line; I. E. Tel. Dept's undertakings in N. Persia' Date: 1906/1911 Language: English Geographic region: KhanikinTehranShahrud
2. File 80/1913 Pt 4 'Persia: Telegraphs' Date: 1924/1931 Language: English Geographic region: TehranKhanikinKerind
