Information sur la source
Ancestry.com. The Mississippi Valley, and prehistoric events [base de données en ligne]. Provo, UT: Ancestry.com Operations Inc, 2005.Données originales : Walker, C. B.. The Mississippi Valley, and prehistoric events : giving an account of the original formation and early condition of the great valley, of its vegetable and animal life, of its first inhabitants, the mound builders, its mineral treasures and agricultural developments : all from authentic sources. Burlington, Iowa: R.T. Root, 1880, c1878.
