Congress.gov
Congress.gov contains the Congressional Record and full text legislation from 1993 (104th Congress) to the present.

Constitutional Amendments and Major Civil Rights Acts of Congress Referenced in Black Americans in Congress | History & Art Archives: U.S. House of Representitives

Wikipedia REFERENCES 

We are all familiar with Wikipedia*, but one may not realize that the references listed with many of the entries provides information that may lead to primary source material. Scroll down to the sections labeled References or Sources for potential research material. Consider searching by personal name or event. 

*Do NOT use Wikipedia articles as a source.

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• American Indian Movement (AIM): Three-Point Program, Trail of Broken Treaties, Alcatraz Occupation, Red Power Movement, Senate Treaty Commission, Bureau of Indian Affairs, Invasion of Wounded Knee, Siege of Custer, Dennis Banks, Clyde Bellcourt, Eddie Benton-Bonai, George Mitchell, Russell Means, ...

• Asian American Movement: Chinese Exclusion Act, Civil Liberties Act of 1988,

• Black Civil Rights: Jim Crow Laws, Civil Rights Act of 1957, Woolworth's Lunch Counter, Little Rock Nine, Freedom Riders,  Civil Rights Act of 1964, Bloody Sunday, Voting Rights Act of 1965, Fair Housing Act of 1968, ...

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