Chattopadhyay, G N, and L N Mandal. “DISTRIBUTION OF DIFFERENT FORMS OF NITROGEN IN BRACKISHWATER FISH-POND SOILS OF WEST BENGAL”. Indian Journal of Fisheries, vol. 27, no. 1 & 2, Nov. 2011, pp. 140-4, https://epubs.icar.org.in/index.php/IJF/article/view/11988.