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CFR - Code of Federal Regulations
Code of Federal Regulations  
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FAR - Federal Acquisition Regulations
Federal Acquisition Regulations (FAR) - General Services Administration
FAR Search Engine via University of California  
FAR Supplements
Agriculture Acquisition Regulations (AGAR) with Circulars Incorporated and Agriculture Acquisition Circulars (AAC)(from USDA)
Defense Federal Acquisition Regulation Supplement (DFARS) and Procedures, Guidance, and Information (PGI) (from DPAP)
Defense (DFAR) FAR Supplement (from USGI)
Army FARS
Department of Transportation TAR (from DOT)
NASA FAR Supplement (from NASA)
NASA FAR Supplement (from USGI)
DOE FAR (DEAR) Supplement
DOE FAR (DEAR) Supplement (from USGI)  
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Army Research Office
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Miscellaneous
Export Control Regulations
 
Export Control

Use the decision tree to determine if you need an export control license.
http://export.stanford.edu/tree/index.html