Image: Otto Struve US post 1949crop
Otto_Struve_US_post_1949crop.JPG (168 × 209 pixels, file size: 15 KB, MIME type: image/jpeg)
Description: Otto Struve on the US Post envelope, part of Philatelic Tribute to America's Immigrants
Title: Otto Struve US post 1949crop
Credit: This file was derived from Otto Struve US post 1949.JPG:
Author: Otto_Struve_US_post_1949.JPG: US Post derivative work: Materialscientist
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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