The spectra of stars belonging to class R of the Draper classification
By: by W. Carl Rufus
Publisher: University of Michigan, Detroit Observatory
Published: 1916
Place of publication: Ann Arbor
Language: eng
Number of pages: 45
Subjects: Stars; Spectra
Notes: "Reprinted from the Publications of the Observatory of the Universiy of Michigan, Vol. II"--Cover.

Issued also as thesis (Ph. D.)--University of Michigan.

Includes bibliographical references.