Bibliography
- Schmid, G. (2001-07-11). "Report on the existence of a global system for the interception of private and commercial communications (ECHELON interception system) (2001/2098(INI))". European Parliament A5-0264/2001. http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//NONSGML+REPORT+A5-2001-0264+0+DOC+PDF+V0//EN&language=EN. Retrieved 2006-12-21.
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