REMOVE

1. Agricultural laborers

WHAT

1. Child labor (1)
2. Children -- Employment (1)
3. Food supply (1)
4. World War, 1914-1918 -- C … (1)

WHERE

1. United States (2)
2. District of Columbia (1)
3. New York (1)
4. New York (State) (1)
5. Washington (1)

WHO

1. National Child Labor Comm … (1)
2. United States Boys' Worki … (1)

WHEN

1. 1917 (1)
2. 1919 (1)