@book{49326,
	author = {Rehman,.M .A and Ibne-Rasa,Khairat M. and منظمة الإسلامية للتربية و الثقافة و العلوم (الرباط، المغرب)},
	title = {Chemistry For secondary school level :},
	publisher = {ISESCO,},
	year = {1998.},
	address = {Morocco :}
}