DINESH KUMAR SINGH and PURUSHOTTAM KUMAR (2001) “Influence of diversification of rice (Oryza sativa)wheat (Triticum aestivum) system on productivity, energetics and profitability under on-farm conditions”, Indian Journal of Agronomy, 59(2), pp. 200–203. doi:10.59797/ija.v59i2.4564.