Polardata.ch
| Title | Authors | Year |
|---|---|---|
| Über die miocene Flora der Polarländer. Schweiz. Gesellsch. Verhandl. 1867, pp. 139-152. Archiv. Sci. Phys. XXX, 1967, pp. 61-69. (Trad.) Geol. Mag. V, 1868, pp. 273-280. | Heer, Oswald | 1867 |
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