Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
You can use this work for any purpose, as long as it is not primarily intended for or directed to commercial advantage or monetary compensation. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
Scientific papers of the second International Congress of Eugenics held at American Museum of Natural History, New York, September 22-28, 1921. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.