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AM88, if you want one of the most complete outlines in a single source I recommend you start by grabbing a copy of the following from eBay:
Handbook of German Military and Naval Aviation 1914-1918 It covers the gamut on German flight training, even the Zeppelin course.
Also, JFM's "Manfred von Richthofen: The Aircraft, Myths and Accomplishments of the Red Baron" has a nice outline of MvR's training.
And, many of the contemporary writings from the German pilots themselves describe their own pilot training.
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