The preparation of this volume has been a collective effort. In 
addition to the cooperation received from the contributors themselves in my 
repeated requests for more information or clarification, the assistance of a 
number of others is acknowledged. The United Nations University funding made the 
whole endeavour possible, but thanks are due in particular to Fu-chen Lo and 
Jacob Park. Assistance with the organization of the planning meeting was given 
by Professor Mahmoud Yousry and with the mid-project meeting by Professor Alan 
Gilbert and Keith Rudkin of the Department of Geography, University College 
London. I am indebted to the referees, Professor Akin Mabogunje and Dr. Tony 
O'Connor, whose comments were invaluable, but who cannot be held responsible for 
the final product. Technical assistance with the production of maps and diagrams 
and other support were provided by the technical and administrative staff of the 
Department of City and Regional Planning, University of Wales, Cardiff, and 
Catherine Jele competently and quickly translated between French and English 
where necessary.
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