Biblioteca del Congreso de los EEUU http://id.loc.gov/authorities/names/n90625986
VIAF http://viaf.org/viaf/180700218
Fuente consultada WWW LC online catalog, 27-01-2011
Información encontrada (Norton, Mary. The magic bed-knob; or, How to become a witch in ten easy lessons, New York: The Hyperion press, 1943)