MOUNTAIN BELL U.S. West, Denver-based holding company for Mtn. Bell, well received in opening day of stack trading. RMN N 22, 1983 p.1B,26B Union forces 22 employees to take demotions. Westword N 23, 1983 p.4 Promotions and demotions are contested. Westword N 30y 1983 p.4 Tests new telephone system at Stapleton Airport to accom- odate multiple long-distance networks. RMN D 14, 1983 p.16 Pitkin County asks Colo. Public Utilities Commission for better, cheaper phone service. RMN ;,& D 28, 1983 p.26