Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
Suburban and interurban bus companies listed in the Russell's Official National Motor Coach Guide, which was primarily a resource for intercity bus lines.
Moyers Stages (around Fresno, until 1948)
Fresno-North Fork Stage Line - served Fresno, Pines, Pinedale, Bass Lake.
Huntington Stage Lines - served Fresno, Florence Lake, also existed in 1930's.