Transkription:
Wellenquist, Ake [Anders Edvard
Br. Fol.
Aotan
Bellar
A photometric research on two open clusters
in Cassiopeia (Messier 52 and N.G.C. 663).
4:o Stockholm 1929
fven i: Kungl. Svenska vetenshapsakademiens handlingar.
Ser. B. Bd. 6: 5.
Acta
Sv
Sthm