Baqri, S.R.H., Ghazala Roohi, and Ghulam Mustafa. “A New Record of Trace Fossil Polychaete (annelid) from the Cambrian of the Salt Range, Punjab, Pakistan”. Journal of Himalayan Earth Sciences 34, no. 1 (March 31, 2001): 113-117. Accessed January 1, 2025. http://ojs.uop.edu.pk/jhes/article/view/1538.