Colorado. Taxation House votes $32 million tax hike program. RMN Mar. 13, 1965 p.5 3% tax starts June:lst. Post Nay 5, 1965 P 60 Legislators agree on proposed tax increases. RMN My 2, 1965 p.5 Post My 2, 1965 P 1 Collection costs to soar under new program. post My 16, 1965 P 3 Tax collections from income and other sources listed. Post 11 6, 1965 p.19 0