References
^ Rippelmeyer, Kay (2014). Giant City State Park and the Civilian Conservation Corps : A History in Words and Pictures, Southern Illinois Univ Pr. BiggerBooks. ISBN 9780809329229 (revised Feb 2024)^ (2013). Giant City State Park and the Civilian Conservation Corps : A History in Words and Pictures ECampus. ISBN 9780809329229 (revised Jan 2016)
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