Tyagi , P. K., and V. K. Singh , translators. “Productivity and Economics of Different Double Cropping Systems at Farmer’s Field in Tikamgarh District of Madhya Pradesh ”. Indian Journal of Extension Education, vol. 53, no. 3, July 2017, pp. 112-5, https://acspublisher.com/journals/index.php/ijee/article/view/5032.