Polardata.ch
| Title | Authors | Year |
|---|---|---|
| Die miocene Flora von Spitzbergen. Schweiz. Gesellsch. Verhandl. 1869, pp.156-168. Ann. Sci. Nat. (Bot.) XII, 1869, pp. 302-311. (trad.) Arch. des Sci. Phys. et nat. Nouv. XXXVI, 1869, 279-300 (Trad.) | Heer, Oswald | 1869 |
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