This list is not exhaustive - you should search beyond these suggestions. Some boxes note which project they may be helpful for.
Milwaukee Journal Sentinel digital newspaper. Current content is available as well as a text (back to 1990) and image archive (back to 2018).
The Milwaukee Neighborhoods link will take you to a research guide that may be helpful to identify stakeholders. The guide provides:
Academic Search Complete is a comprehensive scholarly, multi-disciplinary full-text database, with more than 7,000 full-text periodicals, including nearly 6,000 peer-reviewed journals. In addition to full text, this database offers indexing and abstracts for more than 11,000 journals and a total of more than 11,600 publications including monographs, reports, conference proceedings, etc. The database features PDF content going back as far as 1887, with the majority of full text titles in native (searchable) PDF format. Searchable cited references are provided for more than 1,000 journals.