Photo
by J R Eyerman, January 1948.
From right: Carl D. Anderson, W. R. Brode, E. W. Cowan, Christian Elvey.
Raymond V. Adams, Carl D. Anderson, and Eugene W. Cowan,
Observations of Cosmic Rays at High Altitudes,
Rev. Mod. Phys. 21, 72-75 (1949)
E. W. Cowan, A Large Cloud Chamber Using Rear Illumination,
Rev. Sci. Inst., Vol. 20, No. 7, 1949
E. W. Cowan,
Cloud-chamber observations of cosmic rays at high altitude,
Ph.D. thesis, Caltech, 1948