Karl Hecklar, Jussi Bjorling
Note: Longtime member and opera enthusiast Karl Hekler heard Jussi live 33 times, according to his memories. Karl was in the midst of searching through the his collection of opera and concert programs when he passed away.
Hekler, Karl and Flaster, Sue
"Some memories of Jussi Bjorling: concerts and opera performances,"
Journal of the Jussi Björling Societies of the USA & UK: Vol. 21
, Article 10.
Available at: https://scholarsarchive.byu.edu/jussibjorlingsociety/vol21/iss1/10