Helmut Kallman · Helmut Kleinhempel · Helmut Kollmann
Scholarly Pr · University of Toronto Press, Scholarly Publishing Division
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Catalogue of Canadian Composers | 978-0-403-01375-3 (0-403-01375-5) | 2007 |
| Encyclopedia of Music in Canada | 978-0-8020-2881-5 (0-8020-2881-0) | 1992 |