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on some cretaceous echinoids from nigeria

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A short, obscure paper from the Nigerian Geological Survey, by A.G. Brighton (in English)

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Page 1: On some Cretaceous echinoids from Nigeria
Page 2: On some Cretaceous echinoids from Nigeria
Page 3: On some Cretaceous echinoids from Nigeria
Page 4: On some Cretaceous echinoids from Nigeria
Page 5: On some Cretaceous echinoids from Nigeria
Page 6: On some Cretaceous echinoids from Nigeria
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