Sharma, S K, R K Tomar, and K S Gangawar. 2012. “Effect of Crop-Establishment and Tillage Practices on Yield and Economics of Irrigated Rice (Oryza Sativa) - Wheat (Triticum Aestivum) System”. The Indian Journal of Agricultural Sciences 65 (9). https://epubs.icar.org.in/index.php/IJAgS/article/view/19010.