RUBY HELDER: ARTICLES, WEBSITES & RESOURCES
Operavision: Mixed Nuggets of Golden Singing and Novelty 13/05/2008
Berkeley Gazette: Advert 16/03/1932
New York Times: Girl Tenor to Sing Here 02/04/1913
LIstserv 15.5 OPERA_L: RubyHelder 18/09/1996
Webphemera: Ruby Helder
Open Plaque: Ruby Helder
BOOK: Praxial Music Education : Reflections and Dialogues. Edited by David J Elliot. Online copy.
IMAGE: "Portrait of Ruby Helder. Newspaper cutting, undated." [2011.546] - Royal Academy of Music.
IMAGE: Singer Ruby Helder, ca. 1915 - University of Washington Digital Collection