JRScuba
Contributor
This WEB site has great reading material and I use it quite often. It covers all levels of diving and will supply you with many hours of interesting material. Hope this is what you are looking for.
http://www.scubadiving.com/training/0,7253,3-0-0-0,00.html
Joe :rock_band
http://www.scubadiving.com/training/0,7253,3-0-0-0,00.html
Joe :rock_band