^ abcdefMap FCO 18/1863 - 1971 - Map of Trucial States, Muscat and Oman - Rams - Scale 1:100 000 - Published by D Survey, Ministry of Defence, United Kingdom (1971) - Edition 3-GSGS - The National Archives, London, England <https://www.agda.ae/en/catalogue/tna/fco/18/1863>
^ abcdTribulus - Volume 19 - 2011 - Journal of the Emirates Natural History Group - The Flora of the Ru'us al-Jibal -the Mountains of the Musandam Peninsula: An Annotated Checklist and Selected Observations - Gary R. Feulner - Abu Dhabi, United Arab Emirates, 2011<https://enhg.org/Portals/1/trib/V19/TribulusV19.pdf>
^ abcdeMap FCO 18/1861 - 1975 - Map Oman and the United Arab Emirates (UAE): Khasab - Scale 1:100 000 - Published by D Survey, Ministry of Defence, United Kingdom (1971) - Edition 4-GSGS - The National Archives, London, England <https://www.agda.ae/en/catalogue/tna/fco/18/1861/n/1>
^ abcJāmiʻat al-Imārāt al-ʻArabīyah al-Muttaḥidah. Geoprojects (U.K.) Ltd., The National atlas of the United Arab Emirates, Al Ain : United Arab Emirates University - 1993
^ abMap FCO 18/1839 - 1967 - Trucial States, Muscat and Oman: Wadi Al Jizi, with handwritten annotations - Scale 1:100 000 - Published by D Survey, Ministry of Defence, United Kingdom (1971) - Edition 1-GSGS - The National Archives, London, England <https://www.agda.ae/en/catalogue/tna/fco/18/1839/n/1>
^ abcFCO 18/1920 - Boundaries of the Northern Trucial States: prepared and drawn from sketch maps and information supplied by Julian F. Walker; preliminary edition - 1962 - The National Archives, London, England, <https://www.agda.ae/en/catalogue/tna/fco/18/1920>
^ abcMap FCO 18/1787 - 1972 - Oman and the United Arab Emirates (UAE): Dibba, with handwritten annotations - Scale 1:100 000 - Published by D Survey, Ministry of Defence, United Kingdom (1971) - Edition 3-GSGS - The National Archives, London, England <https://www.agda.ae/en/catalogue/tna/fco/18/1787>