Sinha, A. K. (1975) “Calcareous Nannofossils from Simla Hills, (Himalaya, India) with a Discussion of their Age in the Tectono-Stratigraphic Column”, Journal of Geological Society of India, 16(1), pp. 69–77. Available at: https://geosocindia.com/index.php/jgsi/article/view/63504 (Accessed: 20 September 2024).