http://www.guitartricks.com/lesson.php?input=12693&s_id=658
"I learned a long time ago that one note can go a long way if its the right one and it will probably whip the guy with 20 notes." Les Paul - 2002
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I just did a search and it looks like they are covered in section 2 of the Rock Course 2
http://www.guitartricks.com/lesson.php?input=12693&s_id=658
http://www.guitartricks.com/lesson.php?input=12693&s_id=658