Table of Contents

Original Research

Page 5-14
Guillermo Thenoux, Gabriel Garcia
Page 17-26
Carlos Videla, Carlos Aguilar
Page 29-39
José Gerardo Pech Pérez, José H. Loria Arcila
Page 42-52
Eduardo Quinlan Carey
Page 54-62
Alfredo Serpell, Alfredo Sarmientos