The birds of Australia, supplement /.London :Printed by Taylor and Francis ... published by the author ...,[1851]-1869..biodiversitylibrary.org/page/48517301
Indian Jungle Crow (Corvus culminatus) at Paradeniya, Kandy, Sri Lanka. Photographed on 29 July 2007. Split off from the Large-Billed Crow (Corvus macrorhynchos).www.inaturalist.org/observations/53814206
The birds of Australia, supplement /.London :Printed by Taylor and Francis ... published by the author ...,[1851]-1869..biodiversitylibrary.org/page/48517325
The birds of Norfolk & Lord Howe Islands and the Australasian South Polar quadrant :London :H.F. & G. Witherby,1928.biodiversitylibrary.org/page/58795281