Integrated organic petrography, stable isotopes, and geochemistry of Rajmahal coals (India): Implications on depositional conditions - Mahima Panda; Ishwar Rahi; James C. Hower; Vivian A. Edwards; Anupam Sharma; Sk. Md. Equeenuddin; Sourav Ganguly; Bodhisatwa Hazra (International Journal of Coal Geology, 2026)