Blackwood says the reading list doesn't have to be centered around my thesis. Apparently it's more of a list for my committee to use as the basis for my oral exam: "30 or so works from your seminars that best reflect your graduate education," selected from works that were on the syllabi from my seminars.
Wait, I was supposed to keep all the syllabi from my seminars? Mmmkay, it turns out I actually didn't do that. For some of the classes, I doubt that I ever had a hard copy of the syllabus; several of the professors put their syllabi up on Blackboard, so when I wanted to look up the reading assignments for class I just looked at the online copy. In the meantime, the university has moved to a new version of the Blackboard software, and any old courses that were in the system have vanished, as far as I can tell. So far I have managed to dig up two actual, physical syllabi from my grad classes, and one electronic copy of a syllabus that was languishing in my computer. And since I need to get the reading list to my committee as soon as possible, I probably have about 36 hours to come up with the rest of them.