Columbia subject headings:
Foulois, Benjamin D., 1879-1967.
Logbooks--United States.
Research aircraft--United States--History--Sources.
Signal Corps No. 1 (Airplane)
United States. Army--Aviation--History--Sources.
Harvard subject headings:
Aeronautics, Military--United States--History--20th century.
Foulois, Benjamin D., 1879-1967.
Logbooks--United States.
Research aircraft--United States--History--Sources.
Signal Corps No. 1 (Airplane)
United States. Army--Aviation--History--20th century.
United States. Army--Aviation--History--Sources.
United States. Army. Signal Corps--History--20th century.
Princeton subject headings: