Diener, C. (1897). The Permian fossils of the Productus Shales of Kumaon and Gurhwal. Memoirs of the Geological Survey of India, Palaeontologia Indica, Series 15. 1(4): 1-54.
466205
Diener, C.
1897
The Permian fossils of the Productus Shales of Kumaon and Gurhwal
Memoirs of the Geological Survey of India, Palaeontologia Indica, Series 15