Jahan, N., Khan, M., Ghosh, S., Bhuiyan, S. and Hossain, S. 2014. Variability and heritability analysis in F4 genotypes of Brassica rapa L. Bangladesh Journal of Agricultural Research. 39, 2 (Sep. 2014), 227–241. DOI:https://doi.org/10.3329/bjar.v39i2.20426.