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5h 1min, feb 28, 1933 y - references
Description:
nobelprize.org
google.com
britannica.com
www.chemheritage.org
Added to timeline:
12 Jan 2018
0
0
287
atomic theory
by timothy kirkbride
Date:
5h 1min, feb 28, 1933 y
Now
~ 91 years ago