John Fitzgerald is known for Fast Ploughing Techniques (1963), Installation of Ropes on a Multi-Rope Friction Winder (1960) and Using Self-Rescuers (1962).
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Biography
John Fitzgerald is known for Fast Ploughing Techniques (1963), Installation of Ropes on a Multi-Rope Friction Winder (1960) and Using Self-Rescuers (1962).