Pineapple jelly processing at laboratory royal university of agriculture, ការកែឆ្នៃផលិតផលដំណាប់ម្នាស់ នីទីពិលោធន៍ សាកលវិទ្យាល័យភូមិន្ទកសិកម្ម KHIM, RATANA. GRS KHI 2012 B366 Or.1 Phnom Penh RUA 2012 2012 Text vii; 33p. https://drive.google.com/file/d/1DZ86TAtG5eWRrrKjFxswZLG4lh0pFBpz/view?usp=sharing