Century of Progress. 1933. Chicago. Mineral display. Post June 5, 1933 p.25 State exhibit praised by W. J. Eckert. 1933 p.5 Model made by engineers in Denver for Century of Progress Exposition. News Apr. 23, 1933 p.10 Colorado has display of gold nuggets and other ore at W World fair. See clippings: Exhibitions. Chicago World's fair. 1933 0
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