Crook, Hal <br/><br/>
How to Improvise 

 - Rottenburg  Advance Music  1991 
<br/><br/> Musiktheorie, ISBN 3-89221-4 
<br/><br/>Klavier, Jazz, Keyboard, Improvisation, Theorie, Crook, Tontrüger 
<br/><br/>Anhang 2 Kassetten 
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