classic papers of the week -- 55

Spinning Electrons and the Structure of Spectra

• Uhlenbeck, G. E., Goudsmit, S.

See also: The discovery of the electron spin

Particle acceleration by astrophysical shocks

• Blandford, R. D. (California Institute of Technology, Pasadena, Calif.), Ostriker, J. P. (Princeton University, New Observatory, Princeton, N.J.)

Types of Novae

• Zwicky, F.