Columbia subject headings:
Inventors--United States--Biography.
Linotype.
Mergenthaler, Ottmar, 1854-1899.
Typesetting machines--History.
Harvard subject headings:
Inventors--United States--Biography
Linotype.
Mergenthaler, Ottmar, 1854-1899.
Typesetting machines--History.
Princeton subject headings:
Inventors--United States--Biography.
Linotype.
Mergenthaler, Ottmar, 1854-1899.
Typesetting machines--History.