Publications by and about Bangor businesses. Materials include trade catalogs, promotional materials, directories, and histories.

The Trades Procession of the Bangor Carnival featured nearly 150 floats and 600 horses. The Bangor Daily News and Bangor Daily Commercial reported that it was the largest parade in Bangor's history. The carnival, which was organized by the Bangor Chamber of Commerce, also involved cornerstone laying ceremonies at the new high school and library buildings, the first Bangor marathon, flights by aviator Harry Atwood, and the Ferari-Bostock circus.

Monthly publication of the Bangor Hydro-Electric Company. Includes information about employees and projects, and many photographs.

City directories list the address and occupation of residents and provide information about local businesses, schools, churches, social organizations, and more. Access additional directories in the Local History Room.

Glass lantern slides documenting Maine logging operations and the papermaking process. Created by Bangor photographer Leyland Whipple.