@book{26605,
	author = {Lamiaa Ahmed Abdelhameed and Helmi Aboulfetouh , },
	title = {Persistent types of spelling errors : },
	publisher = {Lamiaa Ahmed Abdelhameed , },
	year = {1997},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}