Ma, Jian, Alias Abdullah, & Hajime Kobayashi. " A Study on the Present Status and Issues of Organic Paddy Rice Expansion in Northeast Semi-arid Region of China: The Case Study of T Farm, Baicheng City, Jilin Province." IJEAS : The International Journal of East Asian Studies [Online], 2.1 (2013): 45-60. Web. 6 Dec. 2019