@article {602191,
	title = {Protracted Development of Bioturbation through the Early Palaeozoic Era},
	volume = {8},
	year = {2015},
	note = {
	
		
			
				
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},
	pages = {865-868. doi: 10.1038/ngeo2537.},
	author = {Tarhan, L. G. and Droser, M. and Johnston, D. T. and Planavsky, N.}
}
