Jim,
German Air Force Airlift Operations, by Fritz Morzik, edited by Edward P. Kennedy (1961). 417 pages. this is available as a pdf download from the "Air Force Historical Research Agency" (Maxwell AFB).
The site URL for the relevant page with most of the German studies is
http://www.au.af.mil/au/afhra/number...s/studies4.asp.
While the URL for the above study is
http://www.au.af.mil/au/afhra/number...es/1012410.pdf
This study contains notes on operations in Norway and Holland which may be of interest.