The World Crisis,1915. By Winston S. Churchill. New York: Charles Scribner's Sons,1923, Vol. II., pp. xii, 578, index. $6.50 von Korff, S.A.

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The Holy Alliance. By W. P. CressonPh.D. New York: Oxford University Press, American Branch 1922. pp. 147. $1.50 von Korff, S.A.

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An Introduction to the Study of International Organisation. By Pitman B. Potter, Ph.D. New York: The Century Company. 1922. p. 647. $4.00 von Korff, S.A.

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The World Crisis,1915. By ChurchillWinston S.. New York: Charles Scribner's Sons,1923, Vol. II., pp. xii, 578, index. $6.50 von Korff, S.A.

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The Holy Alliance. By CressonW. P.Ph.D. New York: Oxford University Press, American Branch 1922. pp. 147. $1.50 von Korff, S.A.

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An Introduction to the Study of International Organisation. By PotterPitman B., Ph.D. New York: The Century Company. 1922. p. 647. $4.00 von Korff, S.A.

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The production of neutrons by the cosmic radiation von Korff, S.A.

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Fast neutrons and particles with high specific ionization in the cosmic radiation at high elevations von Korff, S.A.

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Burst in cosmic radiation in the equatorial zone von Korff, S.A.

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Present status of the theory of the effect of the Earth's magnetic field on cosmic rays by M. S. Vallarta, Sc.D., Ph.D von Korff, S.A.

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Cosmic Radiation and the Maintenance of a Potential Gradient in the Atmosphere von Korff, S. A.

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Le Droit des Gens et les Rapports des Grandes Puissances avec les autres États avant le Pacte de la Société des Nations. By Charles Dupuis Paris: Plon-Nourrit, 1921. Pp. 544 von Korff, S.A.

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Le Droit des Gens et les Rapports des Grandes Puissances avec les autres États avant le Pacte de la Société des Nations. By DupuisCharles Paris: Plon-Nourrit, 1921. Pp. 544 von Korff, S.A.

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Geographical Aspects of Cosmic-Ray Studies von Korff, Serge A.

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Some Remarks about the Discharge Mechanism in Geiger Counters von Korff, S. A.

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A Critique of Ionization Measurements of Nuclear Disruptions Produced by Cosmic Radiation von Korff, Serge A.

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Operation of proportional counters von Korff, S.A.

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Nuclear particles in the cosmic radiation von Korff, S.A.

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Solar influences on the cosmic ray intensity at high elevations von Korff, S.A.

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Fast neutron measurements with recoil counters von Korff, S.A.

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