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All of the following are examples of secondary sources except:

a. a biography on abraham lincoln
b. a dvd on the battle of the alamo
c. a civil war era letter
d. a united states history textbook

User Bentley
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1 Answer

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The correct answer is C. A civil war era letter is a primary source from the person themselves and not someone telling you about the letter. 
User Kevin Thibedeau
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