United States

1963

St. Paul Boys Choir. (English (US)) Boston Archdiocesan Boys Choir. (English (US))

Dětský sbor pražské rozhlasové stanice

1933 - 1942

Bulgaria

Струнен квартет "Вълчев"

1973

Germany

Joachim-Koeckert-Quartett

1939 - 1982

Spain

Cuarteto Clasico de Madrid

1945

1963 - 1975

Maîtrise de l'ORTF. (Le français)

Czechoslovakia

Brünner Streuchquartett

1969

Scotland

United States

1947 - 1963

United States

1967

Cleveland Orchestra Boys' Choir. (English (US)) Cleveland Boys' Choir. (English (US)) Cleveland Children's Choir. (English (US))

1852 - 1954

Halle State Philharmonic Orchestra

1954 - 2006

Germany

Children's Chorus of the Essen-Werden Gymnasium. (English (US))

Japan

習志野フィルハーモニー管弦楽団

1969

United States

1971

United States

United States

1971

Switzerland

1966

1966 - 1986

Australia

1939

Italy

Germany

Werner-Egk-Quartett

1980

Zeneművész Társaság

1811 - 1948

Pécsi Szimfónikus Zenekar

1984 - 2003

Pécsi Filharmonikus Zenekar. (Magyar) Pécs Philharmonic Orchestra. (English (US))