TY - Chin J Plant Ecol A1 - Duan Lian T1 - Preliminary Study on Weed Types of Farm Land in Fengqiu County, Henan Province Y1 - JF - Chinese Journal of Plant Ecology JO - Chin J Plant Ecol SP - 292 EP - 299 VL - 12 IS - 4 UR - https://www.plant-ecology.com N1 - ER -