Tiwari, Krishna Kant, R. P. Mukherjee, and R. P. Mukherjee. 1993. “Population Census of Rhesus Macaque and Hanuman Langur in India-A Status Survey Report”. Records of the Zoological Survey of India 116 (1-4):349-69. https://doi.org/10.26515/rzsi/v116/i1-4/1993/160905.