| = NGC 224 | |
| Ref: | =1929ApJ....69..103H |
| by | HUBBLE E. |
| Astrophys. J., 69, 103-157 (1929) | |
| A spiral nebula as a stellar system, Messier 31. | |
| o | Tables I, II, III: [H29] VNN use <BASW NN> (Nos 1-50). Tables IV, V: <[H29] ANN> N=63 among (Nos N1-N86). |
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