@book{32947,
	author = {Ehab Nabil Nasief Mina and Ashraf Nasr Said , },
	title = {Calibration of electronic distance measurement instruments in Egypt / },
	publisher = {Ehab Nabil Nasief Mina , },
	year = {1996},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}