Toulmin, H.A. Air Service American Expeditionary Force 1918. New York, D. Van Nostrand Co., 1927. Sm 4to (6x9"), 388 pages, profusely illus with charts, maps and photos, original red cloth hardcover. Ink inscription on ffep from 1st Lt in the 12th Aero Sqdn. A classic on the U.S. Air Service development and organization, another "must" in your WWI aviation reference library. Scarce. Very good condition.