Identifying and finding books at other libraries : OneSearch and WorldCat
Identifying and finding theses and dissertations :
All three public library systems in NYC offer full in-person and online access to anyone who lives, works, and/or attends school/university in the state of New York. There's a huge overlap of what each system offers--and many of the databases are already available to you through FIT--but look around to see if there's anything interesting!
If you don't already have a card(s):
Step one: Apply for a card for any of these systems
Step two: If you apply online, follow any additional instructions for validation/full access. Some systems only grant limited or temporary use initially and then you must visit one of the libraries in person to complete the process.
Step three: Use what you want!