Anjum M, Ishfaq M, Ullah S, Yaseen M, Ali L, Prsek J, et al. Economic geology of the carbonate rocks from Mesozoic Alpurai group, Peshawar basin, Pakistan. Iran J Earth Sci. 1999 Nov. 30;13(4):239-50. Available from: http://oiccpress.com/ijes/article/view/8152