Tiwari, K. K., Mukherjee, R. P. and Mukherjee, R. P. (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), pp. 349–369. doi: 10.26515/rzsi/v116/i1-4/1993/160905.