Denver. Elections. 1979 Analysis of the challenge in city council race that Paul A. Hentzell faces from George Barrante and Richard Bettinger. Post Ap 4, 1979 p.18 The three mayoral candidates debate air pollution. RMN Ap 4, 1979 p.10 Post Ap 4, 1979 p.11 Main issue in mayoral race is incumbent McNichols. Post Ap 8, 1979 p.32,43 Mayor McNichols debates with Muftic and Mitchell, each candidate explains changes that would occur if they were elected. Post Ap 11, 1979 p.11 RMN Ap 11, 1979 p.4,45 s