G. PRIYANKA. “RICE- WEED ECOSYSTEM UNDER MECHANIZED SYSTEM OF RICE INTENSIFICATION (MSRI) IN NORTH COASTAL A.P”. The Journal of Research ANGRAU, vol. 44, no. 3&4, Dec. 2016, pp. 13-17, https://epubs.icar.org.in/index.php/TJRA/article/view/140425.