Estonian postage stamps. From left to right and top to bottom: S1, S2
By A Mystery Man Writer
Description
Download scientific diagram | Estonian postage stamps. From left to right and top to bottom: S1, S2, S3,..,S18. from publication: An infrared and SEM study of the margins of some Estonian postage stamps. | | ResearchGate, the professional network for scientists.
Calaméo - V01 0000 0000 20220101 V3 01
German postage stamps used in this study. From left to right and
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