Hippargi, R. V., Bolde, P. M., Rao, M. K., Bolde, A. M., & Gaikwad, S. A. (2014). Observations on bill deformities in three bird species from Maharashtra, India. Journal of the Bombay Natural History Society (JBNHS), 111(3), 226–229. https://doi.org/10.17087/jbnhs/2014/v111i3/82461