@book{UBHD-1458959, author={Pingsdorf, Franz}, title={Der Sternhaufen in der Cassiopeia}, publisher={Georgi}, address={Bonn}, year={1909}, pages={52 S.}, language={ger}, school={Bonn, Univ., Diss., 1909}, library={UB [Signatur: Z 7236 Folio::1-10] ; LS [Signatur: LS/US 3100 P653]}, }