The Getting Started suite of tutorials includes: What Types of Sources Do I Need, How Do I Create a Search Strategy, Should I Rethink My Search, How Do I Evaluate Online Information, How Do I Give Credit to the Ideas of Others, Popular vs Scholarly Sources, Anatomy of a Scholarly Article, Mind Mapping for Focusing Your Topic.
"A primary source is "first-hand" information, a source as close as possible to the origin of the information or idea under study. Primary sources are contrasted with secondary sources, works that provide analysis, commentary, or criticism on the primary sources. In historical studies, primary sources include written works, recordings, or other source of information from people who were participants or direct witnesses to the events in question. Commonly used primary sources include government documents, memoirs, personal correspondence, oral histories, and contemporary newspaper accounts."
Primary sources are original documents created at the time of an event, such as a newspaper account, photographs, or videos. Primary sources also include diaries, memoirs, interviews, and other records that document a past event.
"Sources are considered primary, secondary, or tertiary depending on the originality of the information and how close they are to the source of information." [Relevant to other science and social science disciplines.]