child labor]]> motherhood]]> mortality rates--infant]]> socialism and socialists]]> women and girls--maternal feelings]]> women and girls--and gender roles]]> women and girls--rights of]]> women and girls--working class]]> working classes--children]]> working classes--and family size]]> "To Mothers--Our Duty," New York Call, Mar. 26, 1911]]> Margaret Sanger Papers Microfilm, Library of Congress, LCM 135:172]]> Published Article]]> msp#129332]]>