Geography Atoka County, Oklahoma






^ 2010 census gazetteer files . united states census bureau. august 22, 2012. retrieved february 18, 2015. 
^ cite error: named reference eohc-atokacounty invoked never defined (see page).
^ goldman, daniel; stephen a. leslie; jaak nõlvak; seth young; stig m. bergström; warren d. huff (2007). global stratotype section , point (gssp) base of katian stage of upper ordovician series @ black knob ridge, southeastern oklahoma, usa (pdf). episodes. 30 (4): 258–270. retrieved 20 september 2012. 
^ gssp katian stage . geologic timescale foundation. retrieved 2 december 2012. 






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