Suzanne H. Schrems, PhD. of Norman has written a fascinating book about the role of women in early Oklahoma politics. She covers the far left, woman's suffrage, conservatives, even the role of women in the Ku Klux Klan.
One chapter is dedicated to the only woman from Oklahoma to serve in the US Congress -- Alice Mary Robertson. (Hint: I doubt many of us would vote for her if she ran for Congress today.) At Amazon.com, look for Across the Political Spectrum: Oklahoma Women in Politics in the Early Twentieth Century, 1900-1930 (Lincoln, NE: Writers Club Press, 2001)