Davis, Andrew M. (Chicago Univ. Chicago, IL, United States)
Clayton, Robert N. (Chicago Univ. Chicago, IL, United States)
Mayeda, Toshiko K. (Chicago Univ. Chicago, IL, United States)
Sylvester, Paul J. (Chicago, University IL, United States)
Macpherson, Glenn J. (National Museum of Natural History Washington, DC, United States)