Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105.[1]Archived 4 March 2016 at the Wayback Machine
Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105. [2]Archived 4 March 2016 at the Wayback Machine
Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105. [3]Archived 4 March 2016 at the Wayback Machine
Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105.[1]Archived 4 March 2016 at the Wayback Machine
Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105. [2]Archived 4 March 2016 at the Wayback Machine
Sharma, P.K. and P. S. Rahgavaiah (2002). "Effect of Rainfall on Grey Pelican (Pelecanus philippensis) Arriving and Breeding at Nelapattu Bird Sanctuary, Andhra Pradesh". Indian Forester, October 2002, pp. 1101-1105. [3]Archived 4 March 2016 at the Wayback Machine