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Cassel. Botanisches Centralblatt, XXXVI, 6; XL, 8. I. V. Williamson Fund. 



Geognostische Jahreshefte. 1888. Jahr., I. I. V. Williamson Fund. 



Malakozoologische Blatter, N. F., Bd. XI. I. V. Williamson Fund. 



Verein fur Naturkunde. Berichte. 34, 35. The Society. 



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N. S. Dec, 1888, 1889, III, 4-8. The Academy. 



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 des Seances de l'Annee 1889 No. 1 — 6. The Academy. 



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