Thanks for posting, I am looking for authentic sources for Sanger, to put together a little damning collection, a simple, short, easy to read package, but I do not want to be humiliated and discredited by letting any fake stuff slip in.
The Pivot of Civilization
By Margaret Sanger
1922; Publisher: Brentano's
Woman and the New Race
By Margaret Sanger
1920; Publisher: Brentano's
If you use a search engine such as http://www.bookfinder.com, you can find copies dirt cheap of these.
Plus you can find other books by her by enter her name as the author (Last Name followed by First Name) on this site.
This is site that is a search site only -- it will re-direct you amazon, abebooks, alibris, Barnes & Noble, as well as other sites that actually sell books...