Anitha, S., et al. “Effect of Thiourea Application on Cowpea [<i>Vigna unguiculata< I> (L.) Walp.] Productivity under Rainfed Conditions”. Journal of Tropical Agriculture, vol. 42, Oct. 2006, pp. 53-54, https://jtropag.kau.in/index.php/ojs2/article/view/117.