SHEKHAWAT, R. S.; SINGH, K. N.; BHATTARAI, M.; GURUNG, B.; LAMA, A.; SARKAR, K. P.; DONI, R. Growth and Diffusion Dynamics of Tractor in Punjab. Indian J Agri Sci 2019, 89 (6), 1054–1056. https://doi.org/10.56093/ijas.v89i6.90835.