Columbia subject headings:
Cincinnati (Ohio)--Commerce.
Mississippi River--Commerce.
Ohio River--Commerce.
Steam-navigation--United States.
Harvard subject headings:
Cincinnati (Ohio)--Commerce.
Mississippi River--Commerce.
Ohio River--Commerce.
Steam-navigation--United States.
Princeton subject headings:
Cincinnati (Ohio)--Commerce.
Mississippi River--Commerce.
Ohio River--Commerce.
Steam-navigation--United States.