@article {265806,
	title = {Late Archean biospheric oxygenation and atmospheric evolution},
	journal = {Science},
	volume = {317},
	number = {5846},
	year = {2007},
	note = {
	
		
			
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},
	pages = {1900-1903},
	author = {Alan J. Kaufman and Johnston, David T. and James Farquhar and Andrew L. Masterson and Timothy W. Lyons and Steven Bates Ariel Anbar and Gail L. Arnold and Jessica Garvin and Roger Buick}
}
