Colorado; Taxation Bill on tax loophole which allows deductions for corporate contributions to political causes failed to move out from the house Rules Committee. RKN My 3, 1977 P-30 Senate gives initial approval to a "tax shift" pkg. Food tax credit involved. Post Je 3, 1977 p.1 PM Je 3, 1977 P 5 Tax on retail businesses for litter control passed. ftMN Je 24, 1977 P-8 Post Je 24, 1977 p.4 0