Expeditions and Discoveries Sponsored Exploration and Scientific Discovery in the Modern Age

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You searched for: Creation Date 1912 Remove constraint Creation Date: 1912 Creators/Contributors Pickering, Edward C. (Edward Charles), 1846-1919 Remove constraint Creators/Contributors: Pickering, Edward C. (Edward Charles), 1846-1919 Genre Observations Remove constraint Genre: Observations Subjects Stars--Observations Remove constraint Subjects: Stars--Observations Subjects Stars--Magnitudes Remove constraint Subjects: Stars--Magnitudes

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