DEVELOPMENT AND TESTING OF SMALL-SCALE TUBER HARVESTER,ការផលិត និងធ្វើតេស្តឧបករណ៍ប្រមូលផលដំណាំមើមខ្នាតតូច MANG RATHA,ម៉ង់ រដ្ឋា AGE MAN 2020 B1-462 Or. phnom penh rua 2020 2020 Text xii,36p. https://drive.google.com/file/d/1ND8ZxMwrlxTn2uVhssZ8nJJyQN5QnDUx/view?usp=sharing