Barbershop singing -- Alberta -- Calgary. / https://id.loc.gov/authorities/subjects/sh85011800 https://id.loc.gov/authorities/names/n79034973-781 : Stebbins, Robert A.,
Barbershop singing -- Social aspects. / https://id.loc.gov/authorities/subjects/sh85011800 https://id.loc.gov/authorities/subjects/sh00002758 : Stebbins, Robert A.,