 |
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| The 21st International Congress of Ophthalmology
held in Mexico City was
commemorated by this Mexican FDC issued in 1970. The stamp shows a detailed anatomical feature of a bisected eye including the hyaloid canal.
|
|||
|
|
|||
| The 21st International Congress of Ophthalmology
held in Mexico City was
commemorated by this Mexican FDC issued in 1970. The stamp shows a detailed anatomical feature of a bisected eye including the hyaloid canal.
|
|||
|
