Singh, Brajesh, and Santosh Kumar. 2008. “Geochemistry of Biotite, Muscovite and Tourmaline from Early Palaeozoic Granitoids of Kinnaur District, Higher Himachal Himalaya”. Himalayan Journal of Sciences 2 (4):248-49. https://doi.org/10.3126/hjs.v2i4.930.