There are hundreds of libraries in the NYC area, each has their own Library Access Rules. Please refer to individual library's websites to learn about their access rules and policies.
METRO referral cards provide courtesy access to many libraries throughout New York City and Westchester County.
If you are unable to locate a specific item in one of the NYC research libraries that are open to the public such as NYPL, FARL, the MoMA library or the Watson library at the Met, please contact the librarians with all citation details for the item. Library staff can issue METRO cards referring users to participating METRO libraries.
To find out what other local libraries hold an item consult http://www.worldcat.org.