Multichannel communication microwave system for Hetch Hetchy Water and Power

Hetch Hetchy Water and Power System. Microwave communication systems -- California -- Stanislaus National Forest. Microwave communication systems -- California -- Tuolumne County. Telecommunication systems -- California -- Stanislaus National Forest. Telecommunication systems -- California -- Tuolumne County. Public utilities -- California -- San Francisco -- Communication systems.