classic papers of the week -- 128

The electromagnetic field of an idealized star in rigid rotation in vacuo

• Deutsch, Arnim J. (Mount Wilson and Palomar Observatories, Carnegie Institution of Washington, California Institute of Technology)

Relations Between the Spectra and Other Characteristics of the Stars

• Russell, Henry Norris

Characteristic forms and geometric invariants

• Shiin-Shen Chern (University of California at Berkeley), James Simons (University of New York at Stony Brook)