Effect of diferent cultural practices on weeds and yield of chinese cabbage nonheading, (ឥទ្ធិពលនៃបច្ចេកទេសដំាដុះផ្សេងៗគា្នលើស្មៅចង្រៃ និងទិន្នផលនៃដំណាំស្ពៃក្រញាញ់) HY KIMMENG AGR HY 2013 B056 Or.1 phnom penh RUA 2013 2013 Text xi, 48p. https://drive.google.com/file/d/1HXc8Dr-c_PrxMq9_KaGIq8Acl8Y4eYKL/view?usp=sharing