REMOVE

1. World War, 1914-1918
2. Periodical illustrations
3. Airplanes

WHAT

1. Artillery (Weaponry) (1)
2. Drawings and Watercolors (1)
3. Periodical illustrations (1)
4. World War, 1914-1918 (1)

WHO

1. Library of Congress Print … (1)
2. Penfield, Edward (1)

WHEN

1. 1866-1925 (1)
2. 1917 (1)