Abstract : This guide seeks to aid scholars and researchers to locate collections of primary and secondary documents on the Air Force. The first part deals with official Air Force depositories, which are essential to the historian writing about its operations worldwide. The second part describes the equally important collections of the National Archives and its depositories, including the pertinent papers in the Presidential Libraries. The third part covers university and college collections of personal papers of various military and civilian leaders, as well as other documents, which deal with the Air Force. Other governmental depositories-federal, state, and local-plus a number of private collections where Air Force material may be found are listed in part four. Finally, the last section describes a variety of other collections where primary and secondary materials on military, naval, and civil aviation-which directly or indirectly have impinged on the development of the Air Force-may be found.