U. P. Singh, N. S. Venkatesh, K. S. Godhavari, R. Gopalkrishnan, . Fareeduddin, and M. S. Rao, “Lamprophyre Dykes in Chotanagpur Gneissic Comlex, Near Simdega, Gumla District, Jharkhand”, jgsi, vol. 63, no. 6, pp. 655–658, Jun. 2004.