Columbia subject headings:
Aeronautics, Commercial--History.
Pan American World Airways, Inc.
Trippe, J. T. (Juan Terry), 1899-1981.
Harvard subject headings:
Aeronautics, Commercial--History
Pan American World Airways, Inc.
Trippe, J. T. (Juan Terry), 1899-1981
Princeton subject headings:
Aeronautics, Commercial--History.
Pan American World Airways, Inc.
Trippe, J. T. (Juan Terry), 1899-1981.