Columbia subject headings:
Harvard subject headings:
Eugenics--Italy--History--19th century.
Eugenics--Italy--History--20th century.
Positivism--History--19th century.
Positivism--History--20th century.
Sergi, Giuseppe, 1841-1936.
Princeton subject headings:
Eugenics--Italy--History--19th century.
Eugenics--Italy--History--20th century.
Positivism--History--19th century.
Positivism--History--20th century.
Sergi, Giuseppe, 1841-1936.