الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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Abstract
In recent years attention to the problem of high levels of indoor radon exposure and associated health risks has been growing around the world in some enclosures such as workplaces,dwellings,caves tunnels and archaeological places such as ancient egyptian tombs and temples.indoor radon comes from several major sources principally the soil,rock underlying and surrounding buliding foundations and buliding materials as well as ground water and natural gas.