The New York County Lawyers' Association (NYCLA) is the bar assocation for Manhattan lawyers. NYCLA is usually referenced in this Guide for their excellent library, which as a particularly strong collection of New York State and City materials.
The address for the NYCLA Web site is www.NYCLA.org. The site has a separate section for www.NYCLA.org, which include the online catalog.
NYCLA's telephone number is 212-267-6646. Extensions 204, 205 and 206 will get you to the library.