Ulrich’s Periodicals Directory is a bibliographic database providing
detailed, comprehensive, and authoritative information on serial
publications throughout the world. It covers all subjects, and includes
publications that are published regularly or irregularly and are
circulated free of charge or by paid subscription.
The United States Patent & Trademark Office website provides free access to patent documents including full text for patent grants since 1976, full page
images since 1790, and patent applications published from March 2001 to present.
Research Databases 
