Additional bus companies, listed as existing during additional years or decades, are mentioned in old City Directories, and 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.
McJunkin Bus Line (Jacksonville to Fernandina, until 1959)
Airline Service - existed in 1940's to 1950's.
Beach Motor Transit Co. - existed in 1940's to 1950's.
Fernandina Bus Lines - existed in 1940's to 1950's.