Peculiar stars Stellar classification Spectral atlas Monterey Institute for Research in Astronomy Notes References Further reading The Cambridge Encyclopedia of Stars by James B. Kaler (2006). External links An Atlas of Stellar Spectra by W. W. Morgan, Philip Keenan & Edith Kellman. 1918 births 2011 deaths People from Grand Forks, North Dakota People from Grand Forks County, North Dakota People from North Dakota American astronomers American physicists American astrophysicists Spectroscopists United States Army personnel of World War II Harvard College alumni University of Chicago alumni University of Chicago faculty University of California faculty University of Michigan faculty University of Texas at Austin faculty Case Western Reserve University faculty Scientists from Cleveland