Open-Source Intelligence (OSINT) can be described as publicly available information appearing in print or electronic form including radio, television, newspapers, journals, the Internet, commercial databases, and videos, graphics, and drawings (From www.dni.gov)
Counterterrorism and Open Source Intelligence by 
Defining Second Generation Open Source Intelligence (OSINT) for the Defense Enterprise by 
Open Source Intelligence : An Examination of Its Exploitation in the Defense Intelligence Community by Open Source Intelligence: A Professional Handbook by 
Open Source Intelligence in a Networked World by 
Open Source Intelligence in the Twenty-First Century by 
Open Source Intelligence Techniques by 
