Blue cross - blue shield plan Blue shield medicare practices scrutinized. Post Ag 27, 1971 p.3 Criticized by physicians for delinquency in paying bills Cervi's Journal 0 11, 1971 p.1,3 Colorado branch cleared of any intent to defraud in Medicare. RVIN 0 31, 1971 p.24 Two administrators, 1 doctor ask Colorado legislative panel's intervention in million dollar struggle over Medicare. Post N 18, 1971 p.3 RMN N 18, 1971 p.62 0