袁隆平保健医生:袁老系在研究基地摔了一跤,正在医院治疗 [Yuan Longping health care doctor: Mr. Yuan fell in the research base and is being treated in the hospital]. 湖南红网 [Hunan Red Network]. Archived from the original on May 22, 2021. Retrieved May 22, 2021.
usda.gov
ars.usda.gov
"Improving Corn". www.ars.usda.gov. United States Department of Agriculture.
袁隆平保健医生:袁老系在研究基地摔了一跤,正在医院治疗 [Yuan Longping health care doctor: Mr. Yuan fell in the research base and is being treated in the hospital]. 湖南红网 [Hunan Red Network]. Archived from the original on May 22, 2021. Retrieved May 22, 2021.