t e r t i a r y s o u r c e s
(plus your History Textbook)
s e c o n d a r y s o u r c e s
p r i m a r y s o u r c e s
Well-organized database of curated Smithsonian sources.
JSTOR also contains primary sources. (You can toggle to images at the start of the search.)
Well-organized, consistently curated site for primary sources.
This source is an OG website for primary sources. However, the site is not always staffed, so sometimes there is "link rot" (where the link is dead as the webpage no longer exists).
Still, think of it like a treasure hunt if you cannot find what you're looking for with Smithsonian Collections or Library of Congress.