Title: The spectra of stars of Secchi's fourth type /
Authors: Hale, George Ellery, 1868-1938.; Ellerman, Ferdinand, 1869-; Parkhurst, John Adelbert, 1861-1925.; Ellerman, Ferdinand, 1869-1940,; Parkhurst, John Adelbert, 1861-1925,
Publisher: Univ. of Chicago Press,
Year: 1903
Subjects: Stars Spectra