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For professional and amateur palaeontologists alike, Fossils of the Upper
Ordovician, edited by David Harper and Alan Owen, is an ideal introduction
to identifying the fossils of the Upper Ordovician between 458 and 443 million
years ago. Copiously illustrated with photographs and drawings, it is the latest
in an invaluable series published by Britain鈥檚 Palaeontological Association.
拢16, ISBN 0901702579. Visit the website at:
http://www.nhm.ac.uk/paleonet/PalAss/PalAss.html.