There is bound to be something in at least one of these databases that will help you locate some pertinent primary documents for your paper.
Atlanta Constitution (1868-1984)
Atlanta Daily World (1931-2003)
The Chicago Defender (1909-1975)
Chicago Tribune (1847-1993)
Christian Science Monitor (1908-2003)
Detroit Free Press (1831-1999)
Los Angeles Sentinel (1934-2005)
Los Angeles Times (1881-1992)
The Michigan Chronicle (1939-2010)
The Nashville Tennessean (1812-1922)
New York Amsterdam News (1922-1993)
New York Times w/ Index (1851-2013)
Pittsburgh Courier (1911-2002)
The Wall Street Journal (1889-1999)
The Washington Post (1877-2000)
The Library of Congress's American Memory site has some great women's history collections. Here are three you might find useful.
Selections from the National American Woman Suffrage Association Collection, 1848-1921.
Prints and photographs of women's suffrage from the Library of Congress's extensive collection.
Photographs from the Records of the National Woman's Party.
(Images courtesy of the Library of Congress's American Memory site)