Discrimination in employment High jobless rate of blacks deplored. RMN Global My 16, 1971 p.8 Chicanos not adequately represented in DURA construction, protestors say. Post Jy 21, 1971 p.30 RAIN Jy 21, 1971 p.41 U. S. begins probe of minority hiring on federal construction projects in Denver. RMN Jy 28, 1971 p.5 Post Jy 28, 1971 p.31