Geología general

Ernesto López Ramos was an expert on the subject. He made this coursebook for his students of Geology at the Instituto Politécnico Nacional in México City. In the portrait is a picture taken in 1943 by the author, and is from the eruption of Paricutin Volcano, in Michoacan State in Mexico. It is the first of many books the author write as "Geologia General y de México" and is used actually as textbook in the Geology couses in many universities.