Columbia subject headings:
Mellon family.
Mellon, Andrew W. (Andrew William), 1855-1937.
Mellon, Thomas, 1813-1908.
Pittsburgh (Pa.)--History.
Harvard subject headings:
Mellon family.
Mellon, Andrew W. (Andrew William), 1855-1937.
Mellon, Thomas, 1813-1908.
Pittsburgh (Pa.)--History.
Princeton subject headings:
Mellon family
Mellon, Andrew W. (Andrew William), 1855-1937.
Mellon, Thomas, 1813-1908.
Pittsburgh (Pa.)--History.