Campbell, William Wallace, 1862-1938. Stellar motions [microform] : with special reference to motions determined by means of the spectrograph / by William Wallace Campbell.

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Campbell, William Wallace, 1862-1938.

Stellar motions [microform] : with special reference to motions determined by means of the spectrograph / by William Wallace Campbell.

Stars -- Motion in line of sight.

Spectrograph.

1913.