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Start Over Authors Frisch, Johann Leonhard, 1666-1743, Author ✖Remove constraint Authors: Frisch, Johann Leonhard, 1666-1743, Author Titles [Eighteenth century scientist using microscope] ✖Remove constraint Titles: [Eighteenth century scientist using microscope] Dates by Range 1700-1749 ✖Remove constraint Dates by Range: 1700-1749

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