Secondary Sources are works written about your topic AFTER they happened. They provide context, analysis , and useful facts you need to better understand and explain your primary sources.
Counterculture Protest Music during Vietnam War
The closing of mental institutions in the 1960s/70s
("psychiatric hospitals" OR "mental health institutions" OR asylums OR "mental health hospitals") AND history AND "united states"
Books (examples "From asylum to prison : deinstitutionalization and the rise of mass incarceration after 1945" and "Asylum : inside the closed world of state mental hospitals" and "The architecture of madness : insane asylums in the United States" and "Asylum ways of seeing : psychiatric patients, American thought and culture"
Articles (Examples "The Final Years of Central State Hospital" or "FROM ASYLUM TO PENITENTIARY: THE SOCIAL IMPACT OF EASTERN OREGON CORRECTIONAL INSTITUTION UPON PENDLETON."
Jazz Artists of Harlem Renaissance
""Harlem renaissance" AND Jazz
books (examples: "A history of the Harlem Renaissance" or "Harlem speaks : a living history of the Harlem Renaissance" or "Brotherhood in rhythm: the jazz tap dancing of the Nicholas brothers")
Articles (Examples: "Black Artists Who Rewrote the Rules" or " Black music: pathmaker of the Harlem renaissance. Black music: pathmaker of the Harlem renaissance."
Photographers/Journalists during Civil Rights Movement
(photographer* OR journalist*) AND "civil rights movement"
Books (Ex "Advancing the civil rights movement : race and geography of Life magazine's visual representation, 1954-1965" or "This light of ours activist photographers of the civil rights movement")
Articles (EX ""I Take the Pictures as I See Them": Doris Derby as Womanist, Activist and Photographer in the Civil Rights Movement." OR "EYEWITNESS: Through important and provocative articles in the Chicago Defender journalist Ethel Payne introduced Alabama's civil rights struggles of the 1950s and 1960s to a wider audience"
Concentration Camp survivors
"Holocaust survivors" OR ("concentration camps" AND survivor*)
May need to narrow to:
AIDS crisis in the gay community 1980s.
AIDS AND (crisis OR pandemic OR epidemic) AND (gay OR queer OR lgbt*)
books (See chapters in "AIDS, identity, and community : the HIV epidemic and lesbians and gay men" or "Positive images : gay men & HIV/AIDS in the culture of 'post crisis'" or "Infectious ideas : U.S. political responses to the AIDS crisis"
articles (ex "One Out Gay Cop: Gay Moderates, Proposition 64, and Policing in Early AIDS-Crisis Los Angeles, 1969–1992." or "The Church and the AIDS Crisis in New York City."
women's rights in Virginia during the Suffrage Movement