REDDY, M D; KUMAR, K A. ’Production efficiency of winter season sunflower (Helianthus annuus) - based cropping systems under Sri Ram Sagar Project command area of Andhra Pradesh. The Indian Journal of Agricultural Sciences, Delhi, India, v. 69, n. 6, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/26786. Acesso em: 27 oct. 2025.