B.S. MANKOTIA, J. SHEKHAR, R.C, THAKUR, and S.C. NEGl, “Effect of organic and inorganic sources of nutrients on rice (Oryza sativa) - wheat (Triticum aestivum) cropping system”, IJA, vol. 53, no. 1, pp. 32–36, Oct. 2001, doi: 10.59797/ija.v53i1.4830.