1. Cooper, Douglas. "Public and Private." The Observer. May 25, 1958.
2. Musmanno, Michael A. "THE SACCO-VANZETTI TRIAL." Chicago Daily Tribune., Apr 20, 1959.
3. Kenneth Prescott, The Complete Graphic Works of Ben Shahn (New York: Quadrangle Books, 1973), 35.
4. Stuart Preston, "Art: Painters' and Sculptors' Prints," New York Times, Sep 15, 1964.
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