Q. Importance of primary and secondary sources in history?

A good starting place is our Different Types of Sources guide. The Home tab has a general definition, and the Examples from the Social Sciences tab has some specific examples for History. If that doesn't give you enough, this website has a more thorough explanation, and this one actually gets into how historians use the different types of sources (their importance). If you still need more help, don't hesitate to contact our History Librarian, Patrick Crowley.