COMPARISON OF GRAFTED RATE ON FOUR RUBBER CLONES AT CAMBODIAN RUBBER RESEARCH INSTITUTE,ប្រៀបធៀបអត្រាបំបៅលើក្លូនកៅស៊ូចំនួន ០៤​នៅវិទ្យាស្ថានស្រាវជ្រាវកៅស៊ូកម្ពុជា VUOCH CHIVORN,វួច ជីវ័ន RUB VUO 2022 B477 Or. phnom penh rua 2022 2022 Text xii,56p. https://drive.google.com/file/d/1DEHKRYJn72WHXoQ_kon-RJHfTamVtjIX/view?usp=sharing