Millikan, Robert Andrews, 1868-1953. The Significance of Recent Cosmic-Ray Experiments / by R. A. Millikan and I. S. Bowen.

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Millikan, Robert Andrews, 1868-1953.

The Significance of Recent Cosmic-Ray Experiments / by R. A. Millikan and I. S. Bowen.

Cosmic rays.

Bowen, Ira Sprague, 1898-1973

National Academy of Sciences (U.S.)