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| Author | Title | Year | |
|---|---|---|---|
| 1. | CNR perfins / CPR perfins | 1988 | |
| 2. | Catterick, J. W. | Canadian railroad perfins | 1989 |
| 3. | Catterick, Jim | Alberta Railway & Irrigation Company | 1984 |
| 4. | Fennell, M. B. | Variations in hole size of same perfins | 1988 |
| 5. | Haack, Edwin C. | Background on perfin users - Electric Railways of Western Canada | 1979 |
| 6. | Hanes, Dave | Intercolonial Railway of Canada [perfins] | 1980 |
| 7. | Johnson, Jonathan | Railway perfins | 1979 |
| 8. | Johnson, Jon | Similar CNR perfins | 1980 |
| 9. | Johnson, Jon | Federal Department official use of CPR perfins? | 1985 |
| 10. | Lyding, John | Registration stamp and small queen combined on unique cover | 2001 |