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NY=105-8999 °° 8 2. APPENDIX SSE ’ cee PROGRESSIVE LABOR PARTY PROGRESSIVE LABOR MOVEMENT, "PROGRESSIVE LABOR" ne Movement would try to hold a national convention in New York City in September, 1964, to organize the Progressive fabor Movement on a more formal basis into a Progressive Labor Party. The fifth source also advised that the Progressive Labor Movement publishes a monthly magazine called, "Progressive Labor” and also a quarterly theoretical publication called the "Marxist-Leninist quarterly." ' The source also advised that starting June 1, 1964, the Progressive Labor Movement would start publishing a weekly newspaper in New York City. The March, 1964, issue of "Progressive Labor" sete forth that it is published monthly by the Progressive Labor Company, General Post Office Box 808, Brooklyn 1, New York.