Contributions by: Barbara Arroyo, Ronald L. Bishop, Oswaldo Chinchilla Mazariegos, John E. Clark, Barbara W. Fash, Virginia Fields, Stephen D. Houston, Simon Martin, Fred W. Nelson, Megan O'Neil, Dorie Reents-Budet, Karl A. Taube, Gene L. Titmus, Loa P. Traxler, Adrián Velázquez Castro