Seasonal incidence of larval Trematodes in Costa Rica

by Tonn, R. J., Hunter, G. W., Alfaro, M., Zúñiga, J. A., Redmond, Donna L.
Published 1964

A survey of three Costa Rican communities for intestinal parasites

by Hunter, George W., III, Swartzwelder, J. C., Redmond, D. L., Shearer, L. A., Tonn, R. J., Vargas Alvarado, Rodrigo, Alfaro Brenes, Mario, Zúñiga Ríos, José Antonio, Rodríguez Montoya, César
Published 1965