Hardwood Injector Side: 1 of 2
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Hardwood Injector, photograph, October 27, 1961; (https://gateway.okhistory.org/ark:/67531/metadc1833896/m1/1/?q=%22United+States%22: accessed May 23, 2024), The Gateway to Oklahoma History, https://gateway.okhistory.org; crediting Oklahoma Conservation Historical Society.