Linh, Trung, Anh, and Chiến. “ASSESSMENT OF LAND USE EFFICIENCY FOR SELECTED KEY CROPS IN BAC SON SƠN DISTRICT, LANG SON PROVINCE”. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, vol. 10, no. 4, Jan. 2025, doi:10.51453/2354-1431/2024/1224.