Baer_embryos.png (165KB, MIME : image/png)
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Images of Embryos of different species in different developmental stages, depicting Baer's rule
"Über Entwickelungsgeschichte der Thiere" Bd. I-II. Königsberg, 1828, 1837
between 1820 - 1840
Karl Ernst von Baer, died 1876
Copyright expired as artist died more than 70 years ago
This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.
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