@book{21951,
	author = {Mohamed Ezz Eldin Mohamed and Eglal Refai , },
	title = {Geophysical investigation of the lithosphere in north Egypt / },
	publisher = {Mohamed Ezz Eldin Mohamed , },
	year = {1997},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}