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United Nations Today. : suggestions for speakers.

The United Nations and Iraq. : Defanging the viper. /

United Nations and decolonization : a teaching guide

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23 general assembly of the International union of radio science (URSI) : Prague, 28 august - 5 september 1990 : abstracts. Volume 1.

23 general assembly of the international union of radio science (URSI) : Prague, 28 august - 5 september 1990 : abstracts. Volume 2.

20 general assembly IUGG Vienna, 11-24 August 1991.