The Spanish borders were determined centuries before 1975. Post-1975 corrections and adjustments if any can be found in the United Nations Treaty Series (1945-), or from the foreign ministries of the relevant countries (Portugal, Spain, France, Andorra, the UK/Gibraltar).
For the story of the Franco-Spanish border, see Peter Sahlins, 1989, "Boundaries: the making of France and spain in the Pyrenees", Uni California Press, Berkeley. It is available in many libraries, and should be easy to find second hand.
Pre-1945 adjustments can be found in the LEague of Nations Treaty Series (1918-40s), and Parry's "Consolidated Treaty Series" (231v. Dobbs Ferry, N.Y., Oceana Publications -c1981) which reproduces most international treaties from 1648-1920.
"The map of Europe by Treaty : showing the various political and territorial changes which have taken place since the general peace of 1814" / by Edward Hertslet. London : Butterworths, 1875-1891
For the British/Gibraltar boundary see also
"Hertslet's commercial treaties : a collection of treaties and conventions, between Great Britain and foreign powers." London : Henry Butterworth, 1910-1925. (30+ volumes).
For the boundaries of the Spain/Morocco at Ceuta and Melilla, see Rezette, R., 1976, "The Spanish enclaves in Morocco", Nouvelles Editions Latines, Paris. This is a translation of the original in French.
Dr Brendan Whyte
Ubon Ratchathani University
> Date: Sun, 18 Jan 2009 12:32:35 +0000
> From: [log in to unmask]
> Subject: Introduction and inquiry about spanish borders
> To: [log in to unmask]
> Welcome to all the memebers of INT-BOUNDRIES forum,
> My name is Karolina Glab and I`m a student of University of Wroc³aw, Poland
> at Department of Geography. I`m in course of writing the thesis about
> Political Geography of Spain since 1975. My work includes the chapter about
> the spanish borderlines. And here I`m facing the problem, as so far I
> haven`t found official data bases about all the international agreements
> between Spain and its neighbouring countries mentioning point by point the
> borderlines demarcation I need.
> Is anybody who could help me to show where to look for those historic law
> documents or who know a person I cold talk to about it? I can speak Polish,
> English and Spanish.
> Best regards,
> Karolina Glab
> [log in to unmask]
> University of Wroc³aw,Poland
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