RAM, R A, and A K VERMA. “Energy Input, Output and Economic Analysis in Organic Production of Guava (Psidium Guajava) Cv. Allahabad Safeda”. The Indian Journal of Agricultural Sciences, vol. 87, no. 4, Apr. 2017, pp. 462–466, https://doi.org/10.56093/ijas.v87i4.69339.