Gangwar, B. and Ram, B. (2005) “Effect of crop diversification on productivity and profitability of rice (Oryza sativa)- wheat (Triticum aestivum) system*”, The Indian Journal of Agricultural Sciences, 75(7). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/9091 (Accessed: 27 October 2025).