Quoc Viet, Nguyen, Pham Anh Hung, Tran Thi Hong, & Le Thi Kim Dung. " Assessing the Impact of Drought on Agricultural Production and Proposing the Conversion of Suitable Cropping Systems in Thach Ha District, Ha Tinh Province." VNU Journal of Science: Earth and Environmental Sciences [Online], 35.4 (2019): n. pag. Web. 22 Nov. 2024