por Katayama, Arata, Bhula, Raj, Burns, G. Richard, Carazo Rojas, Elizabeth, Felsot, Allan, Hamilton, Denilson, Harris, Caroline, Yong Hwa, Kim, Kleter, Gijs, Koedel, Werner, Linders, Jan, Peijnenburg, J. G. M. Willie, Sabljic, Aleksandar, Stephenson, R. Gerald, Racke, D. Kenneth, Rubin, Baruch, Unsworth, John, Wauchope, R. Donald

Recursos: Universidad de Costa Rica

Repositorio: Kérwá