Campbell, W. W. (1913). Stellar motions: With special reference to motions determined by means of the spectrograph. Yale university press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Campbell, William Wallace. Stellar Motions: With Special Reference to Motions Determined by Means of the Spectrograph. New Haven: Yale university press, 1913.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Campbell, William Wallace. Stellar Motions: With Special Reference to Motions Determined by Means of the Spectrograph. Yale university press, 1913.
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