Boychoir Festival Northfield, Minnesota Sunday, April 7, 1973
The date is uncertain since it is not on the program. Also I cannot remember the venue, but I believe it was on the Princeton University campus.
Mozart Mini-Marathon Concert at Spoleto Festival - 1973 The Columbus Boychoir participated in this multi performer concert.
Concert Program March 17, 1973 Monmouth Regional High School, New Shrewsbury, New Jersey
Concert Program March 19, 1973 Williamsport, Pennsylvania