Abid, S. ., N. A. Shah, A. . Hassan, A. . Farooq, and M. A. . Masood. “Growth and Trend in Area, Production and Yield of Major Crops of Khyber Pakhtunkhwa, Pakistan”. Asian Journal of Agriculture and Rural Development, vol. 4, no. 2, Feb. 2014, pp. 149-55, http://archive.aessweb.com/index.php/5005/article/view/1131.