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https://phibetaiota.net/2010/08/handbook-online-for-internet-tools-and-resources-for-creating-open-source-intelligence-osint-by-dr-ran-hock-chief-training-officer-online-strategies-inc/
2014 Handbook Online for Internet Tools and Resources for Creating Open Source Intelligence (OSINT) by Dr. Ran Hock, Chief Training Officer, Online Strategies, Inc