@book{UBHD-1056965, author={Pongratz, Walter and Seebach, Gerhard}, title={Burgen und Schl{\"o}sser Ysper-P{\"o}ggstall -Weiten}, publisher={Birken-Verl.}, address={Wien}, year={1972}, pages={156 S.}, language={ger}, library={UB [Signatur: 73 A 306]}, }