Washington progress report, text of address by David L. Ladd, commissioner of patents, for delivery before Judicial, Legal and Government Group, Century of Negro Progress Exposition, Chicago, III., Aug. 17, 1963.
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Washington progress report, text of address by David L. Ladd, commissioner of patents, for delivery before Judicial, Legal and Government Group, Century of Negro Progress Exposition, Chicago, III., Aug. 17, 1963.
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Washington progress report, text of address by David L. Ladd, commissioner of patents, for delivery before Judicial, Legal and Government Group, Century of Negro Progress Exposition, Chicago, III., Aug. 17, 1963.