@book{609,
	author = {SAP, SOTHUN.},
	title = {Effect of urea levels on growth of celery cabbage under hydroponic condition ឥទ្ធិពលនៃកំរិតអ៊ុយរ៉េលើការលូតលាស់ដំណាំស្ពៃចង្កឹះដាំក្មុងលក្ខខណ្ឌសសូលុយស្យុង},
	publisher = {RUA},
	year = {2005},
	address = {Phnom Penh}
}