His masterpiece from 1931, “Venomous snakes found in Costa Rica, their venoms, anti-ophidic serotherapy” is a fascinating compendium of observations and experiments that even to date amaze experts, despite the fact that they were made in very poor conditions.
Su obra magistral de 1931, titulada "Serpientes venenosas de Costa Rica, sus venenos, seroterapia antiofídica" es un compendio formidable de observaciones y experimentos que, pese a su realización en condiciones muy precarias, incluso hoy, asombran a los expertos.