Thank you to Liza Rosenof (Legal reference intern, 2013) for her work on the initial version of this guide.
One of the best ways to find out about the particular sources of law in a state is to consult a print research guide published for that state. Check ScholarOneSearch for titles (Tip: Do a subject search for Legal Research -- [name of state])
Here are some examples:
Many states have a legal encyclopedia. You can usually recognize them by their titles: most contain the terms "jurisprudence" or "practice", such as New York Jurisprudence or Massachusetts Practice.
Legal encyclopedias are available in print, on Westlaw or Lexis, or both. You can find these by searching ScholarOneSearch (to limit your search to print, select "Law Library Catalog" from the drop-down menu next to the search bar), or by consulting Westlaw or Lexis directly.
On WestlawNext: from the main page, go to Browse Sources > State Materials. Select your state, then go to Secondary Sources > All Texts & Treatises.
On LexisAdvance: from the main page, go to Explore Content > State. Select your state, then go to Secondary Sources > All Treatises, Practice Guides and Jurisprudence.
The links below are good places to start for general research on state laws across the country.