If the item you want is checked out, place a hold on it so the library will contact you when the item comes back in. Ask for items through interlibrary loan. If the library does not have enough materials on your subject, ask the librarian to interlibrary loan some items for you from another library. Remember to submit your interlibrary loan requests early. Check online subscription databases.
Many libraries subscribe to online databases for their patrons.
Ask your librarian, if your library has access to these databases. Ask the librarians for assistance. Your best resource in finding all the necessary information is your librarian. Just because it is on the lnternet, does not mean it is accurate information. Know what entity is publishing the information.