John, Sverup, et al. “<i>Makaram</i>/and/<i>Kumbham</I>/-/Two/Improved/Rice/Varieties/for/the/Cherady/Tracts/of/Kerala”. Journal of Tropical Agriculture, vol. 41, Oct. 2006, pp. 4-6, https://jtropag.kau.in/index.php/ojs2/article/view/88.