radio, television, broadcasts, missing broadcasts
In the decades following the death of Swedish tenor Jussi Bjorling, certain missing radio and television broadcasts have been said to exist in one collection or another. Most are still missing.
"Missing Bjorling Broadcasts: A Challenge,"
Journal of the Jussi Björling Societies of the USA & UK: Vol. 4
, Article 12.
Available at: https://scholarsarchive.byu.edu/jussibjorlingsociety/vol4/iss1/12