Changes

* Bowman, Martin. ''P-51 Mustang vs Fw 190: Europe 1943-45'' (2007) [http://www.amazon.com/P-51-Mustang-Fw-190-1943-45/dp/1846031893/ref=pd_bbs_sr_3?ie=UTF8&s=books&qid=1210610630&sr=8-3 excerpt and text search]

* Bowman, Martin. ''P-51 Mustang vs Fw 190: Europe 1943-45'' (2007) [http://www.amazon.com/P-51-Mustang-Fw-190-1943-45/dp/1846031893/ref=pd_bbs_sr_3?ie=UTF8&s=books&qid=1210610630&sr=8-3 excerpt and text search]

* Cooling, Benjamin Franklin ed. ''Close Air Support'' (1990) GPO

* Cooling, Benjamin Franklin ed. ''Close Air Support'' (1990) GPO

* Craven, Wesley and James Cate, eds. ''The Army Air Forces In World War II''] official history. (1948–55)  

* Craven, Wesley and James Cate, eds. ''The Army Air Forces In World War II'' official history. (1948–55)  

** [http://www.airforcehistory.hq.af.mil/Publications/fulltext/aaf_wwii-v3.pdf Volume Three: ''Europe: Argument to V-E Day January 1944 to May 1945'']

** [http://www.airforcehistory.hq.af.mil/Publications/fulltext/aaf_wwii-v3.pdf Volume Three: ''Europe: Argument to V-E Day January 1944 to May 1945'']

** [http://www.airforcehistory.hq.af.mil/Publications/fulltext/aaf_wwii-v6.pdf Volume Six: ''Men and Planes'']

** [http://www.airforcehistory.hq.af.mil/Publications/fulltext/aaf_wwii-v6.pdf Volume Six: ''Men and Planes'']