Ordinances and contracts under which the Mahoning Valley Railway Company, the Youngstown & Sharon Street Railway Company, the Youngstown Park & Falls Street Railway Company, the Youngstown Consolidated Gas & Electric Company are operating within the City of Youngstown, Ohio.

Mode of access: Internet.

Turbine electric drive, basic principles.

Mode of access: Internet.

Elements of transportation : a discussion of steam railroad, electric railway, and ocean and inland water transportation /

Mode of access: Internet.