1. Mason County Zoning Ordinance Collection: City Planning and Landscape Architecture (CPLA) Contributers: County of Mason Format: Book Publication Date: 1971-12-13 Location: City Planning & Landscape Architecture Reference and Resource Center, Funk Library, University of Illinois Box: 11; Folder: 9 CPLA Sub-Collection: Lake Michigan Development Project Notes: Effective March 3, 1972. Amendments from 1977 to 1996 included.