Ha, Tuan M. 2014. “Production Efficiency and Quality of Mustard Greens (<i>Brassica juncea</I> (L.) Czern) Cultivated According to the Vietnamese Good Agricultural Practice (VietGAP) Guideline in Thai Nguyen City”. Asian Journal of Agriculture and Food Sciences 2 (4). https://ajouronline.com/index.php/AJAFS/article/view/1602.