On the library's home page, in the Start Your Research Here, type in "medical marijuana". See the attached link. Limit it by date and type of information. Click Advanced Search to add a second topic, if wanted:
For instance, you can also try:
Marijuana AND Therapeutic use or
Marijuana AND cancer
You'll find a variety of books, ebooks, articles, book chapters and more.
Our research guide Controversial Issues is also a great place to start - it has specialized databases that are perfect for your paper:
