美国内乱事件列表Philadelphia general strike (1910)(英语:Philadelphia general strike (1910)), 費城, 宾夕法尼亚州 1912 – Lawrence textile strike(英语:Lawrence textile strike), 劳伦斯 (马萨诸塞州)
美国的节育运动distributed by the Industrial Workers of the World in the 1912 Lawrence Textile Strike. Engelman, Peter C. (2004), "Margaret Sanger", article in Encyclopedia