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| Title : | The evolution of some upper Cambrian and lower Ordovician Trilobite Families / Christina Lochman
| | Main author : |  Lochman, Christina
| | Extent : | 20 s. : il., tabulky, fotografie
| | UDC : | 56
| | In : | Journal of Paleontology. -- s. 445-462. -- A publication of The Society of Economic Paleontologists and Mineralogists and The Paleontological Society with the generous support and cooperation of The American association of Petroleum Geologists and The Geological Society of America, Volume 30 May 1956 Number 3
| | Kl.slova : | Evolution - Cambrian - Ordovician - Trilobite - families |
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