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jstor.org
Briggs, Derek E. G.; Kear, Amanda J. (1993). "Decay and Preservation of Polychaetes: Taphonomic Thresholds in Soft-Bodied Organisms". Paleobiology. 19 (1): 107–135. doi:10.1017/S0094837300012343. JSTOR2400774.
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valdalponeheritage.it
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