Look and see if the woman you are researching wrote her autobiography or memoir, for example, Elizabeth Cady Stanton's book, Eighty Years and More (1815-1902) : Reminiscences of Elizabeth Cady Stanton. Call number: JK 1899 .S7 1970.
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)
