Dolma, T., Gupta, A. and Ahmed, N. (2010) “Variability, heritability and genetic advance in lettuce”, Indian Journal of Horticulture, 67(Special Issue), pp. 193–196. Available at: https://www.journal.iahs.org.in/index.php/ijh/article/view/2157 (Accessed: 20 June 2025).