Columbia subject headings:
Mach, Ernst, 1838-1916.
Philosophy, Modern--19th century.
Positivism.
Harvard subject headings:
Mach, Ernst, 1838-1916.
Philosophy, Modern--19th century.
Positivism.
Princeton subject headings:
Mach, Ernst, 1838-1916.
Philosophy, Modern--19th century.
Positivism.