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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:34, 6 June 2010 | 360 × 504 (120 KB) | Jnl chemist | {{Information |Description={{en|1=1897 book in which J. F. C. Hessel's derivation of the 32 crystal classes was re-published.}} |Source=phtocopy of 1897 book: Ostwald's Classcial Exact Sciences |Author=Jnl chemist |Date=1897 |Permiss |
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