p75.
See, e.g., Planned Parenthood, “A History of Birth Control Methods”, November 2006, and the references therein, available at http://tinyurl.com/pk4cz2x .
See, e.g., Planned Parenthood, “A History of Birth Control Methods”, November 2006, and the references therein, available at http://tinyurl.com/pk4cz2x .