@book {mria_herrengasse_????, title = {Herrengasse 9, 1250 - 1988. Vom Adelssitz zum Landesmuseum}, year = {1988}, note = {AK 1988/02}, publisher = {N{\"O} Landesmuseum}, organization = {N{\"O} Landesmuseum}, keywords = {Landesmuseum, Nieder{\"o}sterreich, Wien}, issn = {3-900-464-74-1}, author = {Mria, Sigmund Anna and Feuchtm{\"u}ller, Rupert and Tuisl, Gerhard} }