Data from the study 'Historical Development of independent towns, counties and their population within the borders of North Rhine Westphalia, 1871-1987' are new available under number ZA8681 at GESIS - Data Archive for the Social Sciences.
Primary researcher of this study is: Klaudat, Harald
Access class: A - Data and documents are released for academic research and teaching.
More information is available at the data catalogue: study description.