Venkatachala, B.S. “On Some New Spore Genera from the Upper Carboniferous Coals of Lothringen-Saar-Pfaiz Basin”. Journal of Palaeosciences 11, no. (1-3) (December 31, 1962): 38–42. Accessed August 26, 2024. https://jpsonline.co.in/index.php/jop/article/view/619.