Valdiya, K. S. “Discovery of Late Palaeozoic Brachiopod in the Upper Krol of the Nainital Hills, Kumaun Himalaya”. Journal of Geological Society of India 21, no. 2 (February 1, 1980): 97–101. Accessed September 20, 2024. https://geosocindia.com/index.php/jgsi/article/view/64688.