Tiwari, K.K. et al. 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 (Dec. 1993), 349–369. DOI:https://doi.org/10.26515/rzsi/v116/i1-4/1993/160905.