@book{494,
	author = {TOUCH, SOPHORN.},
	title = {Experimental N.P.K fertilizer effecting by other lever on rubber plant at chup rubber plantation ការពសោធន៍ឥទ្ធិពលជី អ៊ិន.ប៉េ.កា តាមកំរិតផ្សេងៗគ្នាលើដំណាំកៅស៊ូនៅចំកាកៅស៊ូជុប},
	publisher = {RUA},
	year = {2002},
	address = {Phnom Penh }
}