bernardosgr | 0 points | Nov 26 2015 15:55:27
http://www.amazon.com/Open-Source-Intelligence-Techniques-Information/dp/1508636338/ref=sr_1_1?s=books&ie=UTF8&qid=1448553316&sr=1-1&keywords=Open+Source+Intelligence+Techniques%3A+Resources+for+Searching+and+Analyzing+Online+Information
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