Depending on what you are researching you will likely want and need to use different types of sources. The Information Cycle graphic highlights the progression of newsworthy events and the type of coverage and research over time.
Statistics and company and industry information are available in specific databases that the library offers.
A primary source is firsthand information created at the time of the event or topic being studied or a firsthand account of an event later recalled by an eyewitness. Think of it as the raw material of history or research.
A secondary source analyzes, discusses and interprets primary sources. They are materials that have been created AFTER an event has happened.
Tertiary sources are condensed versions of information, compiled from primary and secondary sources. Think of it as a summary that doesn't add new analysis or interpretation.