CHHORN, ENGKEA. Effect of organic and chemical fertilizer on celery cabbage at crop station of royal university of agriculture ឥទ្ធិពលជីសរីរាង្គ និងជីគីមីលើដំណាំស្ពៃចង្កឹះនៅស្ថានីយ៍ពិសោធន៍នៃសាកលវិទ្យាល័យភូមិន្ទកសិកម្ម - Phnom Penh RUA 2008 - ix; 43p. ill. 29cm. Dewey Class. No.: AGR CHH 2008 B036 Or.1