Ministry of Overseas... en.wikipedia.org

Amazon.com: Boletín Oficial... www.amazon.com

Amazon.com: Spain... www.amazon.com

Amazon.com: Spain... www.amazon.com

Amazon.com: Spain... www.amazon.com

Boletín Oficial Del... www.amazon.ca

Amazon.com: Spain... www.amazon.com

File:Palacio de Santa Cruz... commons.wikimedia.org

Amazon.com: Boletín Oficial... www.amazon.com

784px-Adelardo_López_de_Aya... commons.wikimedia.org

Ministry of the Navy... en.wikipedia.org

Faros Españoles Ultramar -... www.abebooks.com

Amazon.com: Spain... www.amazon.com

Amazon.com: Spain... www.amazon.com

manuel-ruiz-zorrilla-1833-1... www.alamy.com

1706259625_asset_still.png cadenaser.com

Age contemporary... www.alamy.com

Spain's foreign minister... www.reuters.com

A Forgotten Colony:... www.europenowjournal.org

Ministry of Defence (Spain)... www.wikiwand.com