Arthur J. Ellis

The divining rod. A history of water witching

Washington 1917.

Eduard Conzemius

Hocus-Pocus to keep the people in fear

Ethnographical survey of the Miskito and Sumu Indians of Honduras and Nicaragua, Government Printing Office, Washington 1932, p. 125.

Leonard N. Beck

Things Magical in the collections of the Rare Book Division

The Quarterly journal of the Library of Congress, Vol. 31, Washington octubre 1974, pp. 208-234.