Gerhart, Martha (Nombre personal)

Lehár, F. Vilia, c1993: caption (Martha Gerhart)

Martha Gerhart WWW site, October 2, 2013 (Martha Gerhart; vocal coach, pianist, translator; on faculty of Southern Methodist University's Meadows School of the Arts, 1997-2004; currently resides in Dallas)

VIAF, sitio web,22 agosto 2023: (puntos de acceso: Martha Gerhart) https://viaf.org/viaf/269973591/#Gerhart,_Martha.