Second additional protocol to the constitution : [together with declarations, general regulations, final protocol and rules of procedure of congresses] Lausanne, 5 July 1974
"Second additional protocol to the constitution : [together with declarations, general regulations, final protocol and rules of procedure of congresses] Lausanne, 5 July 1974"
"Second additional protocol to the Constitution of the Universal Postal Union : (together with declarations, general regulations, final protocol and rules of procedure of congresses), Lausanne, 5 July 1974"
"Second additional protocol to the Constitution (together with declarations, general regulations, final protocol and rules of procedure of congresses), Lausanne, 5 July, 1974"
Union postale universelle (17. congrès : 1974 : Lausanne)
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