Resumen
In this article I discuss how qualitative content analysis can be used in historical research projects with a large amount of text. As an exemplary application I describe the methodical approach I use in my PhD research, which is about the relationships between early theories of social work and social movements. From a system theoretical point of view, I consider social movements and theories of social work as systems of communications, which can be described and compared according to their specific semantics. I reconstruct these semantics by analyzing how the words "Nation" and "Volk" are used in magazines of the labor movement, the youth movement and women's liberation on the one hand and the theories of Alice SALOMON, Herman NOHL and Carl MENNICKE on the other hand. Therefore I combine techniques of qualitative content analysis with quantitative approaches as well as methods of reconstructing concepts of meanings. In this article, I describe the methodology of my thesis, its implementation, and challenges in research practice.