// todo need optimize like in event.jsp. Add indexing or not indexing this page. Leavitt did volunteer work at Harvard College Observatory (2 gen 1893 anni – 14 gen 1902 anni) (Il nastro del tempo)
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Leavitt did volunteer work at Harvard College Observatory (2 gen 1893 anni – 14 gen 1902 anni)

Aggiunto al nastro di tempo:

big history project timeline

ByAlia
23 gen 2018

Data:

2 gen 1893 anni
14 gen 1902 anni
~ 9 years
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