J6002-039: Shoe Leather - Multi-Casting Investigative Techniques: People and Public Records

Green book online [electronic resource]
City-wide directory of agencies, offices, boards, and commissions. Also includes courts and state, federal, & international offices in NYC. Older versions are available at Columbia Libraries in print.

LinkedIn
500 million+ members. Used to manage professional identity and build professional networks. Provides job history and professional contacts. 

Nexis Uni
Locate individuals and professional contact information

ReferenceUSA [electronic resource]
Directory information on U.S. and Canadian business, health care, and residential listings. Search by company name, geographic area, business type, SIC code, yellow page listing, revenue, location, number of employees or any combination of the above. 

ACRIS
The Automated City Register Information System (ACRIS) allows you to search property records and view document images for Manhattan, Queens, Bronx, and Brooklyn from 1966 to the present.

New York City Municipal Archives
The Municipal Archives preserves and makes available New York City government's historical records. Our collections date from 1645 to the present. Records include office records, manuscripts, still and moving images, vital records, maps, blueprints, and sound recordings.

NYCourts.gov
New York State Unified Court System provides online access to Civil Local, Supreme, Criminal, and Family Court records.