The Texas Observer now has all its issues online, but older issues are searchable only by date. For those searching for material on the University of Texas during the time of the stand-ins and similar activity, here is a guide to some Observer links.
Bombing of the University “Y” and formation of Students for Direct Action: http://archives.texasobserver.org/issue/1960/12/02#page=3
Stand-ins begin at the Texas Theater: http://archives.texasobserver.org/issue/1960/12/09#page=5
Stand-ins continue and spread to the Varsity Theater, gaining support from University of Texas faculty members and from Eleanor Roosevelt, former First Lady: http://archives.texasobserver.org/issue/1960/12/30#page=1 (Continues on page 2, easy to scroll down)
Description of activities at the stand-ins: http://archives.texasobserver.org/issue/1960/12/30#page=5
More faculty support, and stand-ins coordinated with national Lincoln’s Birthday demonstrations: http://archives.texasobserver.org/issue/1961/01/14#page=8
Stand-ins reach a peak of 400, with confrontations: http://archives.texasobserver.org/issue/1961/02/18#page=1 (scroll to continuation on page 3, also note page 3 article about other Lincoln’s Birthday demonstrations in Texas and nationally)
“Y” bombers placed on disciplinary probation: http://archives.texasobserver.org/issue/1961/02/25#page=3
Demonstrations at theaters in Austin and elsewhere: http://archives.texasobserver.org/issue/1961/03/04#page=3
A vigil by Booker T. Bonner: http://archives.texasobserver.org/issue/1961/03/18#page=3
standinsanddirtynothings 