@book{49305,
	author = {Hamed Mahmoud Hamed Ibrahim and Hatem Mahmoud Elghandour , },
	title = {Studying of some parameters of solid - state laser / },
	publisher = {Hamed Mahmoud Hamed Ibrahim , },
	year = {2014},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}