Author: Slater, Arthur R.
Publisher:The Epworth press, London
Copyright:1937
Author: Nobbs, Percy E.
Publisher:Oxford university press,London
Copyright:1937
Author: Malalasekera, G. P.
Publisher:John Murray, London
Copyright:1937
Author: Martindale, C.C.
Publisher:Rich and Cowan, Limited, London
Copyright:1937
Author: Mehta, Vaikunth Lalubhai
Publisher:Sam. M. Neksatkhan, Bombay
Copyright:1944
Author: Das, Anshu Pragyan
Publisher:Wildlife Organisation, Forest and Environment Department, Government of Odisha
Copyright:2020
Author: Hutchinson, Lester
Publisher:George Allen and Unwin, London
Copyright:1937
Author: Huxley, Aldous
Publisher:Chatto and Windus
Copyright:1937
Author: Sivaramamurti, C.; Dikshit , K. N
Publisher:Thompson, Madras
Copyright:1944