Investigations representing the departments. Astronomy and astrophysics .. (1903)
University of Chicago · Chicago : The University of Chicago Press · leaf 458
Nebulosity is the Pleiades Si A Mi: li = 2i: Octi>her IJ. lilOl or THE UNIVcHSITY or Decennial Publications, VIII Plate XXVII … Nebula in Cm^m.-. A.f/.C. (JJOU Scale: l = lxr3 Auijust 1. 1»B
Astronomy
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