Venkatachala, B., and R. Kar. “Palynology of the Kathwai Shales Salt Range, West Pakistan. 1. Shales 25 Ft. Above the Talchir Boulder Bed”. Journal of Palaeosciences, vol. 16, no. (1-3), Dec. 1967, pp. 156-6, doi:10.54991/jop.1967.515.