@book{72804,
	author = {Ebtesam Abdalla Elsaid Abdelatief and Ayman Aboelmagd , },
	title = {The effect of temperature on the performance of rare-earth laser crystals / },
	publisher = {Ebtesam Abdalla Elsaid Abdelatief , },
	year = {2018},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}