books.google.co.uk - Long before dinosaurs roamed the earth and fish inhabited the oceans, there were trilobites - one of the most striking groups of animals to populate prehistoric seas. With their exquisitely sculpted shells and finely detailed bodies, these ancient creatures could be as small as a fingernail or nearly...http://books.google.co.uk/books/about/TRILOBITES_2nd_edition_%C3%A9dition_en_angla.html?id=rRyHMz-FkJUC&q=L.Cam&utm_source=gb-gplus-shareTRILOBITES. 2nd edition, édition en anglais
