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Subjects: (George Julius),; 1805-1877; 1809-1884; 1818-1887; 1847-1903; Braun, Alexander,; Caspary, Robert,; Characeae; Correspondence; Engelmann, George J; Engelmann, George,; Equisetaceae; Equisetum; Identification; Isoetaceae; Isoetes; Lemna; Lemnaceae; Letters; Receipts (Acknowledgments)</div>
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Braun, Alexander,</div>
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