http://www.textbookrevolution.org/index.p
http://zshare.net/
http://www.securityfocus.com/
http://www.globalsecurity.org/military/l
http://www.lycaeum.org/rhodium/chemistry/i
http://www.tuxradar.com/content/newbies-g
http://forum.rorta.net/
http://t-militia.org/
http://www.zoklet.net/