In Minds in Print: Mental Health in 19th-Century and Contemporary Periodicals, you've explored texts carefully chosen by your professor.
This guide provides some places for you to locate historical and contemporary resources to explore these themes further.
As you move into locating your own historical articles, you don't have to be limited to these three publications. Feel free to reach out to me, if you want help digging through other titles. A few you could consider
Access the New York Times for everything from breaking news to cooking tips, games, sports, and the Wirecutter. Sign up for an individual New York Times account.
Zotero is free, easy to use, and connects with your web browser to compile sources.