Books
On Walker
Kenneth N. Walker
Airpower's Untempered Crusader
by Martha Byrd Air University Press. 1997
The Air Plan That Defeated Hitler
by Haywood Hansell, Higgins-McArthur, 1972
Planning the American Air War– Four
Men and Nine Days in 1941, an Inside Narrative
by James Gaston, National Defense University Press, 1982