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Gibraltar : talks with Spain, May-October 1966
(1966)
Die Gibraltarfrage : Entwicklung und Rechtslage
Fahl, Gundolf, (1970)
Gibraltar : recent differences with Spain ; pres. to Parl. by the Secretary of State for Foreign Affairs and the Secretary of State for the Colonies
(1965)
La poblacion de Gibraltar : (Sus origenes, naturaleza y sentido)
Rico, Gumersindo, (1967)