Gursahib Singh Manes, and Surendra Singh. “Analytical Appraisal of Energy Input Use in the Production of Maize in Punjab”. Journal of Agricultural Engineering (India) 44, no. 4 (December 30, 2007): 60–66. Accessed June 21, 2026. https://pub.isae.in/index.php/jae/article/view/3360.