F. R. Maunsell , Eastern Turkey in Asia, IDWO, 1901 -1915, sheet n°35 (78 x 56 cm), scale 1:250 000, online in Digital Library for International Research Archive, Item #15892, http://www.dlir.org/archive/items/show/15892 (accessed October 10, 2016).
F. Maunsell’s Eastern Turkey in Asia (1901-1919)