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JacobFlach. en Jacob Flach German Mathematician Physician and Botanist de Jacob Flach deutscher Mathematiker Mediziner und Botaniker thulb unijena de Iusta Funebria Clariimo Excellentiimo Viro Dn Jacobo Flachio Quondam Medicinae Doctori Et Professori Publico Academiae Ienensis Jena author portraitindex de baa onb at Botanists