Jankowski, M. D. (1969). Prussian policy and the development of the Ruhr mining region, 1766-1865.
Chicago Style (17th ed.) CitationJankowski, Manfred Dieter. Prussian Policy and the Development of the Ruhr Mining Region, 1766-1865. 1969.
MLA (9th ed.) CitationJankowski, Manfred Dieter. Prussian Policy and the Development of the Ruhr Mining Region, 1766-1865. 1969.
Warning: These citations may not always be 100% accurate.