Shepherd, H. A. (1890). The antiquities of the state of Ohio: Full and accurate descriptions of the works of the mound builders; defensive and sacred inclosures, mounds, cemeteries and tombs; and thier contents-implements, ornaments, sculptures, etc. Cincinnati: Robert Clarke & Co..

Shepherd, Henry A. The Antiquities of the State of Ohio: Full and Accurate Descriptions of the Works of the Mound Builders; Defensive and Sacred Inclosures, Mounds, Cemeteries and Tombs; and Thier Contents-implements, Ornaments, Sculptures, Etc. Cincinnati: Robert Clarke & Co., 1890.

Shepherd, Henry A. The Antiquities of the State of Ohio: Full and Accurate Descriptions of the Works of the Mound Builders; Defensive and Sacred Inclosures, Mounds, Cemeteries and Tombs; and Thier Contents-implements, Ornaments, Sculptures, Etc. Cincinnati: Robert Clarke & Co., 1890.