Jewell, Jeffrey B. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Eriksen, H. K. (Oslo Univ. Norway)
O'Dwyer, I. J. (Illinois Univ. Urbana-Champaign, IL, United States)
Wandelt, B. D. (Illinois Univ. Champaign, IL, United States)