If you don't want to visit another library system for physical materials you can request many things through Interlibrary Loan, a service that allows library users to request materials from other libraries.
This page provides information about community resources that are freely available in the Baltimore and greater Maryland area. Just make sure you have a library card for the appropriate county if you need it!
If you have ideas for additional resources that should be added, contact a librarian at reference@ubalt.edu or use the suggestion box in the left column.