Parkhurst, John Adelbert, 1861-1925. Researches in stellar photometry during the years 1894 to 1906 / made chiefly at the Yerkes observatory by John A. Parkhurst ...

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Parkhurst, John Adelbert, 1861-1925.

Researches in stellar photometry during the years 1894 to 1906 / made chiefly at the Yerkes observatory by John A. Parkhurst ...

Astronomical photometry.

Variable stars.