Dornbusch, C.E. Unit Histories of the United States Air Forces, Including Privately Printed Personal Narratives. Hampton Bays New York, Hampton Books, 1958. Bibliography, wrps, blue card covers, 4to (8.5x11"), 56 pages. Covers both WWI and WWII. An extremely useful guide for building your aviation library; personally I use it consistently for my own collection. Good; light toning on covers.