ការឆ្លើយតបកម្រិត​ផូស្វ័រលើការលូតលាស់និងទិន្នផលនៃដំណាំខាត់នាដើម, response of phosphorus levels on growth and yield of chinese kale on sady laom SEAK FONG, សៀក​ហ្វុង phnom penh rua 2019 2019 Text ix,34p, https://drive.google.com/file/d/1bjVMCgFWN-6tgt6I4z9pW9nONn4D26GD/view?usp=sharing