Srivastava, K. K, V. J. Zacharias, A. K. Bhardwaj, Jomy Augustine, and Sherly Joseph. 1994. “A Preliminary Study on the Grasslands of Periyar Tiger Reserve, Kerala”. Indian Forester 120 (10):898-907. https://doi.org/10.36808/if/1994/v120i10/7784.