Régimen es el ordenamiento político establecido en una sociedad por los poderes constitucionales que obran sobre ella, así como el conjunto de autoridades políticas del Estado.
The best bibliogaphic entry would probably be: Smythe, Clark. <em>Unsinkable: Folly on the Titanic</em> Little, Brown: New York, 1976.
That is because it seems to be a book about the Titanic itself, whereas the other ones have to do with:
- topics which are less directly related to the subject-matter (the first entry is about maritime laws and the third one is about the animal and plant populations of the lands near the North Pole),
- personal, relative accounts of the events (like the fourth entry, which is an autobiography of a survivor and therefore describes the wreck through the character's own perspective) as opposed to more factual material.
Sub-Saharan Africa<span> is, geographically, the area of the continent of </span>Africa<span> that lies south of the </span>Sahara<span> Desert. Politically, it consists of all </span>African<span> countries that are fully or partially located south of the </span>Sahara<span> (excluding Sudan, even though Sudan sits in the Eastern portion of the </span>Sahara<span> desert).</span>
Asia is called a subcontinent because it is very large land and it is separated from other countries by water.