Columbia subject headings:
Harvard subject headings:
Prussia (Germany)--Politics and government--1840-1861.
Prussia (Germany). Landtag.
Prussia (Kingdom). Landtag
Prussia, East (Poland and Russia)--Politics and government.
Princeton subject headings:
Prussia (Germany)--Politics and government--1840-1861.
Prussia (Kingdom). Landtag
Prussia, East (Poland and Russia)--Politics and government.