Cross-References for NGC 225

0) Numbering system adopted in WEBDA
1) Hoag A.A. et al. 1961, Publ. US. Nav. Obs. 17, 347 Pe
2) Hoag A.A. et al. 1961, Publ. US. Nav. Obs. 17, 347 Pg
3) Ponomareva G.A. 1983, Trudy Gosud. Astr. Inst. Shterneberga LIII, 29
4) Lattanzi M.G., et al. 1991, Astron. J. 102, 177