Palaeontology Electron microprobe

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^ zhang, x.; briggs, d.e.g. (2007). nature , significance of appendages of opabinia middle cambrian burgess shale . lethaia. 40 (2): 161–173. doi:10.1111/j.1502-3931.2007.00013.x. retrieved 2008-08-20. 
^ orr, p. j.; kearns, s. l.; briggs, d. e. g. (2009). elemental mapping of exceptionally preserved carbonaceous compression fossils . palaeogeography, palaeoclimatology, palaeoecology. 277 (1–2): 1–8. doi:10.1016/j.palaeo.2009.02.009. 






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