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| Author | Title | Year | |
|---|---|---|---|
| 1. | Opal Manufacturing Co. | 1971 | |
| 2. | Aitken, John | [Centennial booklets - discrepancy in the release dates] | 1986 |
| 3. | Bayley, Colin H. | Further words on the opal booklets | 1974 |
| 4. | Beaupré, Marc | Un expérimental [ 1972 ] | 1979 |
| 5. | Carlson, John A. | Canada's centennial definitives - the booklets | 1973 |
| 6. | Dicketts, M. B. | Governmental surprises galore for centennial year | 1967 |
| 7. | Dicketts, Michael | Canada: the definitive issue, 1967-1972 - the booklets | 1973 |
| 8. | Eikerts, G. | Centennial issue booklet panes | 1973 |
| 9. | Grieg, William | 1971 experimental booklet | 1974 |
| 10. | Harding, David | Centennial booklet stamps | 1984 |