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Books about Virgona:
The System Works: The Etchings and Random Notes of Hank Virgona by Hank Virgona (Dec 1977)
THE SYSTEM WORKS!--THE ETCHINGS AND RANDOM NOTES OF HANK VIRGONA by Hank Virgona (1977)
Wiki information Virgona:
Steve Virgona is a professional real tennis player based in Chicago. He is currently ranked number two in the world and is a world doubles champion. Virgona's victories include the Australian Open in 2007, the British Pro and the US Open.