Academic Libraries often have subject research guides prepared by librarians and faculty experts. Many include links to open-access Internet resources along with print materials and databases accessible within the libraries.
Here are are a few to start with.
Rutgers University subject guides
Harvard University research guides
Bob Jones University Library subject helps (sic)
It is interesting to compare different institutions' resources and guides, and worthwhile to consider how information is filtered within the academy. Librarians, in general and according to our profession's guidelines, are dedicated to providing access to knowledge, high in quality and rich in diversity. But we are all shaped and restrained by the institutional contexts in which we operate. Which is why it is useful to look outside of our comfort zone, and if we perceive limits in other places perhaps we can better understand the limits we don't always see in our own range of vision.