How to play the blues harmonica

For a blues in G key you need a C key harmonica.
Funky Blues Harmonica Techniques Described*
Blues harmonica Improv, Harmonica
Lessons at Harmonica123.com*
Funky Blues Harmonica!! www.Harmonica123.com*
Beginner Blues Harmonica Lesson - Blues Harp*
Modern Blues Harmonica: overblows!*
Learn Harmonica In 5 Minutes!*
Diatonic harmnonca lessons*
How to play harmonica (the blues)*
Tom Walbank, Harmonica Guru*

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Harmonica techniques
(wikipedia)
How to Play the Harmonica
Lessons by JP Allen
  
Overblowing (wikipedia)
Over-blowing (wikipedia fr)
Virtual keyboard