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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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22 jul 1919 año - First measurements of thickness of the ozone layer
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By
Slimes
22 sep 2017
0
0
611
fecha:
22 jul 1919 año
Ahora mismo
~ 106 years ago
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