Surange, K.R., Prem Singh, and P.N. Srivastava. “Megaspores from the West Bokaro Coalfield (Lower Gondwanas) of Bihar”. Journal of Palaeosciences 2 (December 31, 1953): 9–17. Accessed May 27, 2024. https://www.jpsonline.co.in/index.php/jop/article/view/426.