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semipostal
1981, Mar 25 International Year of Disabled Persons issue unwmk p. 13
| - | 20+2.5l | multi |
1981, Dec 16 Useful insects (1981) p. 13.25x13
| - | 20+2.5l | multi | Syrphus vitripennis |
1982, Aug 18 insect pests (1982)
| - | 20+2.5l | multi | Klapperichicen viridissima |
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