In 2011, among other projects OI scholars completed publication of the 21-volume "Chicago Assyrian Dictionary", a basic cultural reference work. The effort was begun in 1921 by J. H. Breasted, and continued by Edward Chiera and Ignace Gelb, with the first volume published in 1956. Dr. Erica Reiner as editor-in-charge led the research teams for 44 years. She was succeeded by Dr. Martha T. Roth, dean of humanities at the university. Similar dictionaries are under way, including the "Chicago Hittite Dictionary" and one for Demotic.