Lippard, L. R. To the third power.--Martha Kearns on Muriel Rukeyser on Käthe Kollwitz.--Käthe Kollwitz.--Diane Radycki on Adrienne Rich on Paula Modersohn-Becker.--Paula Becker to Clara Westhoff.--May Stevens on Jane Cooper on Rosa Luxemburg.--Threads: Rosa Luxemburg from prison