Agreed on people using GC for "project research" since any good search engine/jounral locator will get you the info you need. Some people just want the easy way out I guess.
I do have a suggestion for anyone interested in NPC sorority history-- I like Bound by a Mighty Vow by Diana Turk. I used it for a paper last year. There are also several journal articles on jewish fraternities and sororities that I enjoyed.
Maybe search GC as well.....