She studied in the 1930s and early 1940s with such composers as Béla Bartók, Aaron Copland, and Arnold Schoenberg.
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Through her mother she received her earliest musical training and was introduced at an early age to the work of French composers like Claude Debussy and Maurice Ravel, both of whom were lifelong influences.
The Canadian composer Jean Coulthard of Vancouver composed her, ``Shelley Portrait``, for the opening of the Concordia Concert Hall, where she also received an honorary degree, and composed, `Gardens`, for Mr. Friedland and Dale Bartlett, pianist.
Jean-Paul Sartre | Jean-Jacques Rousseau | Jean Cocteau | Jean Genet | Jean-Luc Godard | Wyclef Jean | Jean Racine | Jean Chrétien | Jean Michel Jarre | Jean Paul Gaultier | Jean Nouvel | Jean-Michel Basquiat | Jean Giraud | Jean Sibelius | Jean-Luc Ponty | Jean-Baptiste-Camille Corot | Jean-Claude Van Damme | Jean Renoir | Jean-Pierre Rampal | Jean-Léon Gérôme | Jean Harlow | Jean Anouilh | Billie Jean King | Jean Giraudoux | Jean-Bertrand Aristide | Jean Baudrillard | Jean-Pierre Thiollet | Jean-Martin Charcot | Jean Gabin | Jean de Florette |
During the 1970s, Beecroft was busy working as a freelance radio producer, notably creating numerous documentaries for CBC Radio on Canadian composers like Jean Coulthard, Harry Freedman, Bruce Mather, Barbara Pentland, Harry Somers, Gilles Tremblay, and John Weinzweig among others.
During its more than eight decade history, the company published works by a large number of notable Canadian composers, including compositions by Violet Archer, John Beckwith, Keith Bissell, Jean Coulthard, Samuel Dolin, Robert Fleming, Talivaldis Kenins, Walter MacNutt, Barbara Pentland, Godfrey Ridout, Eric Wild, and Healey Willan.