"1865 - 1918" . . "World War, 1914-1918 United States." . . . . "United States" . . "Labor and laboring classes United States." . . "1914 - 1918" . . . . . . . . "The second line of defense a plea for the men and women of to-morrow"@en . "The second line of defense; a plea for the men and women of to-morrow" . . . . "The second line of defense A plea for the men and women of to-morrow" . . . "The second line of defense a plea for the men and women of tomorrow" . . . . . . . . . "The Second Line of Defense. A plea for the men and women of tomorrow"@en .