General Business & Phone Directories
ReferenceUSA
Provides detailed information on more than 11 million U.S. businesses, including 675,000 physicians & dentists.
Available at the Ridgewood Public Library

Find a Dentist
From the American Dental Association

Look-up Directory by MelissaData
Find zipcodes, areacodes, streets, etc., plus demographic information.

Online Doctor Finder
From the American Medical Association

Martindale-Hubbell Lawyer Locator
Searchable by name, firm, location, & practice. Also searches corporate law departments, U.S. goverment lawyers, and U.S. law faculty.