In his book The Races of Europe, The White Race and the New World (1939), Coon used the term "Caucasoid" and "White race" synonymously, as had become common in the United States, although not elsewhere.
In seinem Buch The Races of Europe, The White Race and the New World (Die Völker Europas, die weiße Rasse und die Neue Welt) (1939), verwendet Coon die Begriffe „kaukasoid“ und „weiße Rasse“ häufig synonym — wie es in den Vereinigten Staaten üblich geworden war, jedoch nicht anderswo.