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Mary Rosetta Parkman Ordine dei libri

    Conquests of Invention: Cyrus H. Mccormick, Elias Howe, Thomas A. Edison, William Murdock, Robert Fulton, Guglielmo Marconi, Charles Goodyear,
    Heroes of To-day: John Muir, John Burroughs, Wilfred Grenfell, Robert F. Scott, Samuel Pierpont Lang