D. K. Vatsa, and D. C. Saraswat. “Study on Plot Pattern and Farm Power Utilization for Major Crops in Two Agro-Climatic Zones of Hill Agriculture”. Journal of Agricultural Engineering (India), vol. 44, no. 3, Sept. 2007, pp. 25-29, https://doi.org/10.52151/jae2007443.1277.