There are millions of documents online - here is a good place to start.
Black Freedom Struggle in the United States: Challenges and Triumphs in the Pursuit of Equality: via ProQuest, this collection features select primary source documents related to critical people and events in African American history. For documents related to the contemporary civil rights and anti-racist movement, browse here.
Library of Congress Civil Rights History Project: An oral history collection featuring video recordings of activists and members of national civil rights organizations covering the history of the ongoing movement.
Archives Unbound: (via Gale: log-in) Offers a collection of documents covering the breath American history, including those related to the Civil Rights movement.
Macdonald-Kelce Library - The University of Tampa - 401 W. Kennedy Blvd. - Tampa, FL 33606 - 813 257-3056 - library@ut.edu - Accessibility