Khan, Muhammad Attaullah, M. Javed Khan, and Saeed Akhtar Khan Alizai. 1977. “Stratigraphy and Petrography of the Jutana Dolomite, Khewra Gorge, Khewra, Jehlum District; Punjab, Pakistan”. Journal of Himalayan Earth Sciences 9 (1):43-66. http://ojs.uop.edu.pk/jhes/article/view/1126.