Investigations representing the departments. Astronomy and astrophysics .. (1903)
University of Chicago · Chicago : The University of Chicago Press · leaf 456
Decennial Publications, VIII Plate XXVI … Nebulosity is the Pleiades Si A Mi: li = 2i: Octi>her IJ. lilOl or THE UNIVcHSITY or Decennial Publications, VIII Plate XXVII
Astronomy
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