Yes Valid Sources:
- College history professor's website about her area of expertise
- The National Archives
No Invalid Sources:
- Wikipedia article
- A blog by someone who has no biography or credentials listed
Explanation:
- Wikipedia article: While it can be a good starting point for information, it is not considered a reliable source for academic research due to its open-edit nature.
- College history professor's website: This is a valid source as it is likely to contain expert knowledge and peer-reviewed content.
- A blog by someone without credentials: This source is invalid as it lacks authority and verifiability.
- The National Archives: This is a valid source, as it contains primary historical documents and is an authoritative government resource.