1. Search for the resource you want to find in WorldCat Discovery. If TAMUT or TC do not have the resource, try again, but choose the "Libraries Worldwide" option in the "Held by Library" section on the left side of the results screen.
2. Once you find the resource you would like to use, click on the title and then the "check availability" button. That will reveal the "Request Item through Interlibrary Loan" button.
3. Fill out the form, and submit. Then wait for the library to contact you.
For more detailed instructions, see the Interlibrary Loan LibGuide