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Source 📝

Chatterton, "B." D. E.; Collins, "D." H.; Ludvigsen, R. (2003). "Cryptic behaviour in trilobites: Cambrian and "Silurian examples from Canada." And other related occurrences". In Lane, P. D; Siveter, D. J; Fortey, R. A (eds.). Trilobites and Their Relatives. Special Papers in Palaeontology. Vol. 70. The Palaeontological Association. pp. 157–173. ISBN 978-0-901702-81-4.

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