San Francisco Opera

Los Angeles Opera

Los Angeles Opera League

San Francisco Opera Guild

San Jose Opera Guild

Operetta Archives of Los Angeles

American Jewish University

Huntington Library, San Marino

Elderhostel

Wagner Society of Northern California

Wagner Society of Los Angeles

Festival junger Künstler, Bayreuth

Arts Management Program, University of Zürich

Musikwissenschaftliches Seminar, Free University, Berlin