In 1932 he published the now-defunct Editorial Tauchnitz the first edition of a dictionary of the Spanish and German languages over time, would be widely known as "Dictionary Slaby / Grossmann," referring to their authors. The competence and rigor of the work of both linguists explain the fact that until today, his dictionary constitutes a basic reference work for translators, interpreters, Hispanic, Germanic or students of German and Spanish languages in general. Forty years later, during published its third edition, Part I (Spanish-German) was extensively reworked by Dr. Banzer, who had a long experience in teaching Spanish in the department of applied linguistics at the University of Mainz. After another twenty years have seen the need to put back the work day. As a result of this revision, which has seen several years of work, there have been quantitative and qualitative changes very important: the work has 108 pages, has been revised, completed and modernized the entire lexicon has taken special care in specialized modern terminology. In a word, it has been claimed that the dictionary reflects the rich diversity of carefully current language.