Gupta, V. J. (1984) “On the Age of the Sulcacutus Beds of Spiti, Himachal Pradesh Based on Bajocian-Bathonian Brachiopods”, Journal of Geological Society of India, 25(5), pp. 305–306. Available at: https://geosocindia.com/index.php/jgsi/article/view/65374 (Accessed: 20 September 2024).