Aircraft of all nations, a new series of photographs (1917)
Woodhouse, Henry, 1884- · New York, C. S. Hammond & company · leaf 20
A 75 millimeter anti-aircraft gun and one of the gunners who A Lewis gun used against aircraft by a Canadian anti-aircraft shot down a Zeppelin in France. gun unit.
Airships
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
