Primary resources are items that directly relate to your research topic. The difference between a primary resource and secondary resource depends on your research topic.
Primary resources are:
If you were writing about how boxing champions were trained in the 1920s, your primary resources should all be direct proof of how 1920s boxing champions were trained. Some primary resources could be:
For your topic, a book written in 1993 about the history of boxing would not be a primary resource.
This course focuses on the years 1815-1960, so primary sources should be within those dates or possibly before.
For extra guidance on how to find and use primary sources, please visit USA Marx Library's Primary Source Guide.