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Keywords from Image Description:
H SandeBakhuyzen. en Hendricus Gerardus van de Sande Bakhuyzen Dutch astronomer de Hendricus Gerardus van de Sande Bakhuyzen niederlndischer Astronom Icones Leidenses Universitt Leiden leidenuniv nl Pieter de Josselin de Jong Hendricus Gerardus van de Sande Bakhuyzen Icones Leidenses Pieter de Josselin de Jong PDold