SUR, H S, and A R SHARMA. “Response to Sowing Dates and Performance of Different Sunflower (Helianthus Annuus) Hybrids During Rainy Season in High-Intensity Cropping Systems”. The Indian Journal of Agricultural Sciences, vol. 69, no. 10, Feb. 2013, https://epubs.icar.org.in/index.php/IJAgS/article/view/26989.