Beginning in 1954, Apr. issue lists studies in progress; Oct. issue, completed studies.

This book is a case study of intellectuals in the Mexican Revolution, with specific reference to four men from San Luis Potosi, known in Mexico as "the cradle of the Revolution." These four men--engineer Camilo Arriaga, journalist Juan Sarabia, school teacher Librado Rivera, and student and lawyer Antonio Diaz Soto y Gama--played leadership roles in the "Precursor Movement," commonly defined as all political precedents of the Revolution of 1910-1917, including the manifestoes, strikes, and armed uprisings dating from these men's founding of San Luis Potosi's Club Liberal "Ponciano Arriaga" in 1900 to th outbreak of the Revolution in 1910.