Donald Epand, Fairborn Observatory, U.S.A. Louis J. Boyd, Fairborn Observatory, U.S.A. Giuseppe Cutispoto, Catania Observatory, Italy Marcello Rodono, Catania Observatory, Italy Douglas S. Hall, Vanderbilt University, U.S.A. Gregory W. Henry, Tennessee State University, U.S.A. Katalin Olah, Konkoly Observatory, Hungary