As of 1920, the province was producing small amounts ofiron,copper,lead, andsulphur. Even smaller amounts ofgold andsilver were found in the areas of Sairt and Khairwan.Salt made up the largest mineral industry in the province, so much that it was exported to surrounding provinces. The salt was produced in pans, usingevaporation, and taking 8 to 10 days to mature. The technique and trade was mainly run by localKurds.[20]
^Discoveries Among the Ruins of Nineveh and Babylon - Page 358 by Sir Austen Henry Layard, Austin Henry Layard
^İsmail Soysal,Türkiye'nin Siyasal Andlaşmaları, I. Cilt (1920-1945), Türk Tarih Kurumu, 1983, p. 14.
^Verheij, Jelle (2012). Jongerden, Joost; Verheij, Jelle (eds.).Social Relations in Ottoman Diyarbekir, 1870–1915. Brill. p. 88.ISBN978-90-04-22518-3
^Myhill, John (2006).Language, Religion and National Identity in Europe and the Middle East: A historical study. Amsterdam: J. Benjamins. p. 32.ISBN978-90-272-9351-0.
^Watts, Nicole F. (2010).Activists in Office: Kurdish Politics and Protest in Turkey (Studies in Modernity and National Identity). Seattle: University of Washington Press. p. 167.ISBN978-0-295-99050-7.
^Bayir, Derya (2016-04-22).Minorities and Nationalism in Turkish Law. Routledge. p. 139.ISBN978-1-317-09579-8.
^Fleet, Kate; Kunt, I. Metin; Kasaba, Reşat; Faroqhi, Suraiya (2008-04-17).The Cambridge History of Turkey. Cambridge University Press. p. 343.ISBN978-0-521-62096-3.