1. Map Showing Initial System of Subways and Proposed West Side Subway Extension Proposed Street Car Subways Collection: City Planning and Landscape Architecture (CPLA) Contributers: City of Chicago Bureau of Engineering Format: Map Publication Date: 1951 Location: City Planning & Landscape Architecture Reference and Resource Center, Funk Library, University of Illinois Box: 36; Folder: 1 CPLA Sub-Collection: Cities from Around the World