Khan, Zahid A. “Significance of Grain Size Frequency Data in Interpreting Depositional Environment of the Permian Barakar Sandstone in Rajmahal Basin, Bihar”. Journal of Geological Society of India, vol. 25, no. 7, July 1984, pp. 456-65, https://geosocindia.com/index.php/jgsi/article/view/65501.