Sivarajah, P. 2017. FARM EFFICIENCY MEASUREMENT OF PADDY PRODUCTION IN NORTHERN SRI LANKA USING DATA ENVELOPMENT ANALYSIS (DEA) APPROACH. International Journal of Research -GRANTHAALAYAH. 5, 9 (Sep. 2017), 164–170. DOI:https://doi.org/10.29121/granthaalayah.v5.i9.2017.2226.