The Gregorian Congress of 1904 (Pothier) Format: LP Country Code: UK Label: Discant Date: rec. April 1904The Gregorian Congress of 1904 (Janssens) Format: LP Country Code: UK Label: Discant Date: rec. April 1904Iubilate Deo Format: LP Country Code: IT Label: Angelicum Date: 1975Gregorian Chant - Early Recordings (disc 1a) Format: CD Country Code: US Label: Parnassus Date: rec. circa 1933chant Format: 78 Country Code: DE Label: Christschall Date: rec. circa 1933chant Format: 78 Country Code: DE Label: Christschall Date: rec. circa 1933chant Format: 78 Country Code: DE Label: Christschall Date: rec. circa 1933chant Format: 78 Country Code: DE Label: Christschall Date: rec. circa 1933