American lawyer, social reformer, social scientist and civil rights activist (1866-1948)
Women's International League for Peace and Freedom
National American Woman Suffrage Association
Online Biographical Dictionary of the Woman Suffrage Movement in the United States
A Biographical Dictionary of Women Economists
Breckinridge, Sophonisba Preston, 1866-1948
Breckinridge, Sophonisba P. (Sophonisba Preston), 1866-1948
Catalogo of the National Library of India