Michael H. Kater (2011). "The Nazi Symbiosis: Human Genetics and Politics in the Third Reich". Bulletin of the History of Medicine. 85: 515–516. doi:10.1353/bhm.2011.0067. S2CID72443192.
Ross, Edward Alsworth (October 1927). "Birth Control Review"(PDF). World Population Conference. Archived from the original(PDF) on 2020-05-14. Retrieved 2019-09-02.
Michael H. Kater (2011). "The Nazi Symbiosis: Human Genetics and Politics in the Third Reich". Bulletin of the History of Medicine. 85: 515–516. doi:10.1353/bhm.2011.0067. S2CID72443192.
Ross, Edward Alsworth (October 1927). "Birth Control Review"(PDF). World Population Conference. Archived from the original(PDF) on 2020-05-14. Retrieved 2019-09-02.