Map of French Mandate for Syria and the Lebanon and the states created in 1922, in English. Sources: 
Philip Shukry Khoury: Syria and the French Mandate. The Politics of Arab Nationalism, 1920-1945. Princeton University Press, Princeton 1987, ISBN 978-0-691-05486-5.
Naval Intelligence Division: Syria (= Geographical Handbook Series. B.R. 513). Oxford University Press, Oxford 1943, p. 4
Own work, based on File:Syria, administrative divisions - de - colored.svg
Don-kun, TUBS, NordNordWest