// todo need optimize like in event.jsp. Add indexing or not indexing this page. Leavitt did volunteer work at Harvard College Observatory (2 jan 1893 ano – 14 jan 1902 ano) (Linha do tempo)
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Leavitt did volunteer work at Harvard College Observatory (2 jan 1893 ano – 14 jan 1902 ano)

Adicionado na linha do tempo:

big history project timeline

ByAlia
23 jan 2018

Data:

2 jan 1893 ano
14 jan 1902 ano
~ 9 years
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