I came across a videotape today titled "Out of Orbit: The Life and Times of Marshall McLuhan." It appears that Ong was interviewed for the program.
I also found a 16-page booklet titled "An Introduction to the Crayfish of Missouri" published by the MO Department of Conservation. It lists 28 different varieties. It seems that MO has the world's smallest, the American dwarf crayfish, which grows as big as 1.3 inches long. The booklet also includes a section on cooking crayfish and provides recipes for Crayfish Etouffee, Crayfish Salad, and Crawdad Pilaf.