More about primary sources:
Remember, when searching for primary sources the language of our time may not serve you well. For instance, documents written during World War I would have referred to the conflict as "The Great War." The term "African American" is relatively modern in usage.
Primary sources are often biased. As you analyze them, try to understand the lens through with you view them.
(Thanks to https://sdst.libguides.com/c.php?g=690518&p=4883441)