Table of Contents

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Volume 21, Number 16
15 August 2002

pp 4207-4391

Cover. (41.17 N 8.58 W) Situated on the mouth of the River Douro, Porto (or Oporto) is Portugal's second largest city. Awarded World Heritage status by UNESCO, the historical centre still preserves a strong identity forged over many centuries, clearly visible in its typical houses with colourful façades and freshly washed clothes hanging out of the windows. By Luisa M.Figueiredo, Institut Pasteur, Paris.

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