MUJAHID, A M; GUPTA, A J. Effect of plant spacing, organic manures and inorganic fertilizers and their combinations on growth, yield and quality of lettuce (Lactuca sativa)*. The Indian Journal of Agricultural Sciences, Delhi, India, v. 80, n. 2, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2867. Acesso em: 26 oct. 2025.