Recruiting Advertisement for the Army Air Force. The drawing depicts three members of a bomber crew - pilot, navigator and bombardier in flight suits.
Pg. 15
Harvey Thomas Dunn (1884 – 1952) was an American painter. Dunn was born on a homestead farm near Manchester, South Dakota in the county made famous by Laura Ingalls Wilder's descriptions of prairie life. The young man’s talent was first recognized by Ada Caldwell, an art instructor at South Dakota Agricultural College (presently South Dakota State University), which Dunn attended during 1901-1902. Urged by Caldwell, Dunn pursued his artistic studies in Wilmington, Delaware, under the instruction of Howard Pyle. Dunn was one of a small group of Pyle's defining students who were to revolutionize the illustration world and today are collectively known as the Brandywin School.
In 1906, Dunn obtained his first advertising commission from the Keuffel and Esser Company of New York, and throughout his prodigious career, he created painterly illustrations for the most prominent periodicals of his day, including Scribner’s, Harper’s, Collier’s Weekly, Century, Outing, and The Saturday Evening Post. During World War I, Dunn was one of eight war artists assigned to the American Expeditionary Forces in France.
https://en.wikipedia.org/wiki/Harvey_Dunn
http://www.nrm.org/digital/harveydunn/