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Gosal, G.S. (2004). "Physical Geography of the Punjab"(PDF). Journal of Punjab Studies. 11 (1). Center for Sikh and Punjab Studies, University of California: 31. ISSN0971-5223. Archived from the original(PDF) on 8 June 2012. Retrieved 6 August 2009.
Gosal, G.S. (2004). "Physical Geography of the Punjab"(PDF). Journal of Punjab Studies. 11 (1). Center for Sikh and Punjab Studies, University of California: 31. ISSN0971-5223. Archived from the original(PDF) on 8 June 2012. Retrieved 6 August 2009.