KAUR, PRABHJOT; SINGH, HARPREET; HUNDAL, S S. Spatio-temporal changes in area, production and productivity of wheat (Triticum aestivum) in Punjab. The Indian Journal of Agricultural Sciences, Delhi, India, v. 76, n. 1, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2585. Acesso em: 6 jun. 2026.