Journal of Geography and Regional Planning 2070-1845 Academic Journals 10.5897/JGRP.9000089 Mohammedndash;Bello Yunusa * E-mail: mohammedbelloyunusa@yahoo.co.uk 2008 31 12 2008 09 12 2008 1 9 151 163 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/JGRP/article-abstract/4E5EC68960 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JGRP/article-full-text-pdf/4E5EC68960