Millikan, Robert Andrews, 1868-1953, author. High Frequency Rays of Cosmic Origin. I. Sounding Balooon Observations at Extreme Altitudes / by R.A. Millikan and I.S. Bowen.

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Millikan, Robert Andrews, 1868-1953, author.

High Frequency Rays of Cosmic Origin. I. Sounding Balooon Observations at Extreme Altitudes / by R.A. Millikan and I.S. Bowen.

Cosmic rays.

Radiation.

Bowen, Ira Sprague, 1898-1973, author.

Physical review.