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| Author | Title | Year | |
|---|---|---|---|
| 1. | Canada officials O.H.M.S. stamps | 1956 | |
| 2. | Curtis, Mark S. | Official mail, franking privileges always been contentious issues | 1979 |
| 3. | Faucher, Christine | Les timbres officiels | 1979 |
| 4. | Gordon, W. C. | Revised list of Canadian O.H.M.S. issues, with all varieties as at Sept. 1, 1950 | 1950 |
| 5. | Hillson, J. | Canada officials | 1994 |
| 6. | Jefferies, Hugh | Canada officials | 1989 |
| 7. | Johnson, J.C. | The development of the federal OHMS postal security system | 1988 |
| 8. | Ménard, Henri | Les "timbres de service" du Canada | 1950 |
| 9. | Morrow, Trelle A. | Officals in review | |
| 10. | Morrow, Trelle A. | Officials in review | 1977 |