Letter to the Minister of Public Instruction. 1869.
Related Entities
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Observatoire de Paris
http://n2t.net/ark:/99166/w64b825m (corporateBody)
Delaunay, Charles, 1816-1872
http://n2t.net/ark:/99166/w60p8c5j (person)
Le Verrier, U.-J. (Urban J.), 1811-1877.
http://n2t.net/ark:/99166/w6n379zp (person)