BECKWITH, JOHN, and FREDERICK A. HALL, editors. “Writings by Helmut Kallmann.” Musical Canada, University of Toronto Press, Toronto; Buffalo; London, 1988, pp. 315–324, www.jstor.org/stable/10.3138/j.ctt15jjf8c.27. Accessed 13 Apr. 2021.
Writings by Helmut Kallmann. (1988). In BECKWITH J. & HALL F. (Eds.), Musical Canada (pp. 315-324). Toronto; Buffalo; London: University of Toronto Press. Retrieved April 13, 2021, from http://www.jstor.org/stable/10.3138/j.ctt15jjf8c.27
"Writings by Helmut Kallmann." In Musical Canada, edited by BECKWITH JOHN and HALL FREDERICK A., 315-24. Toronto; Buffalo; London: University of Toronto Press, 1988. Accessed April 13, 2021. http://www.jstor.org/stable/10.3138/j.ctt15jjf8c.27.
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