Tiwari, R. S., & Tiwari, R. S. (1991). Palynological evidence for Upper Permian Raniganj coals in western part of Talchar coal field, Orissa, India. Bangalore: Assoc.
Παραπομπή Chicago StyleTiwari, Rambachan Shyambihari, και Rambachan Shyambihari Tiwari. Palynological Evidence for Upper Permian Raniganj Coals in Western Part of Talchar Coal Field, Orissa, India. Bangalore: Assoc, 1991.
Παραπομπή MLATiwari, Rambachan Shyambihari, και Rambachan Shyambihari Tiwari. Palynological Evidence for Upper Permian Raniganj Coals in Western Part of Talchar Coal Field, Orissa, India. Bangalore: Assoc, 1991.
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