1. 1.

   "German Psychological Warfare". Survey by the American Committee for National Morale. (New York, 1941).

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2. 2.

   "The Nation in Arms". By General von der Goltz. English translation. (London: Hugh Rees, Ltd., 1903).

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3. 3.

   "The Crowd". By Gustave le Bon. English translation. (London: Fisher Unwin, 1903).

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4. 4.

   "Instincts of the Herd". By Wilfred Trotter. (London: Fisher Unwin, 1919).

   • • Google Scholar
5. 5.

   "Fear and Courage". By Edward Glover. Penguin edition. (1940).

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