Labor. Denver Robinson Birch & Tile Co. argue union issue. Post Oct. 3, 1950 p.ll NLRB orders 2 elections in Denver, on Union Shop. Post Dec. 14, 1950 p.22 Union activity upheld in Denver.wholesale drug firm. Post Jan. 24, 1951 p.15 Derision against Cullen-Thompson Motor Co. in Denver. Post March 28, 1951 p.2 Case dropped with Denver Post. Post June 19, 1951 p.2 Election in Denver (N.L.R.B.) to dbtermine union shop issue. Post July 7, 1951 p.2 brick