Ytterby black stone and earth-metal elements (Helsinki University article)

March 3, 2019

http://www.helsinki.fi/yliopistonhistoria/oivallukset/2_oivallus.htm?fbclid=IwAR1w9YNMs9GZfKOA6i5F_sy5b9AQoive3u0vPWz0_2SKe-WhqgmOoCuOwlU

 

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2019: The Year of the Periodic Table 150 years

March 3, 2019

https://balticeye.org/en/eutrophication/elemental/Ytterby-1/

https://balticeye.org/en/eutrophication/elemental/ytterby-22/

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