Petroforms of South Dakota TR (NRIS 64000798)

• Archeological Site 39HD22 (Danforth)
• Archeological Site 39HU189 (Macs Corner)
• Archeological Site 39HU201 (Pierre)
• Archeological Site 39HU66 (Canning)
• Archeological Site 39JE10 (Wessington Springs)
• Archeological Site 39JE11 (Gann Valley)
• Archeological Site 39TU5 (Freeman)

National Park Service documentation: https://npgallery.nps.gov/AssetDetail/NRIS/64000798