Research index·Book chapterH27 Sep 2006DOI10.4324/9780203968956-17Book chapterH2006 · SubscriptionDOI10.4324/9780203968956-17ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsGeographyRelated papersMoreDetailsPublished, issue, languageSuggest a correction or report