The Coleccion SepSetentas which was published by the Departamento de Divulgación de la Secretaría de Educación Pública during the recent presidential term of Lic. Luis Echeverria (1970-1976), contains many volumes of interest to historians. However, it should be noted that of the 315 volumes, which form this Colección, some are readily identifiable as historical while there are some which were not written by historians or not written explicitly to narrate past events. In great measure this style of writing corresponds to the modern tendency (as Alejandra Moreno Toscano asserts vol. 143) to supplement historical research with the findings of anthropologists, sociologists, economists, geographers and urbanists. On the other hand, some authors in SepSetentas state that they will study human groups or anthropological problems, systems and structures, but since they use the historical method, their volumes are useful also to the historian.