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|a Sistema de Bibliotecas de la Universidad Nacional Autónoma de Nicaragua, UNAN-León
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| 082 |
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|a 562 L257
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| 100 |
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|a Landing, Ed
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| 245 |
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|a Upper Cambrian to Lower Ordovician Conodont Biostratigraphy and Biofacies, Rabbitkettle Formation, District of Mackenzie / Ed Landing, Rolf Ludvigsen, Peter H. von Bitter
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| 260 |
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|a Toronto : ROM
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| 300 |
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|a 42 p. il.
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| 650 |
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|a 1.INVERTEBRADOS FÓSILES 2.PALEONTOLOGÍA -CÁMBRICO
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| 700 |
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|a Ludvigsen, Rolf Bitter, Peter H. von
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| 999 |
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|c 6321
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