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You searched for: Creation Date 1918 Remove constraint Creation Date: 1918 Digital Format Books and documents Remove constraint Digital Format: Books and documents Genre bibliography Remove constraint Genre: bibliography Repository John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics Remove constraint Repository: John G. Wolbach Library, Harvard-Smithsonian Center for Astrophysics Repository Widener Library, Harvard University Remove constraint Repository: Widener Library, Harvard University Series Open Collections Program at Harvard University Remove constraint Series: Open Collections Program at Harvard University Subjects Variable stars--Observations Remove constraint Subjects: Variable stars--Observations
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