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Russell L. Hall

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Lower Bajocian (Jurassic) Cephalopod Faunas from Western Canada, and Proposed Assemblage Zones for the Lower Bajocian of North America
Lower Bajocian (Jurassic) Cephalopod Faunas from Western Canada, And, Proposed Assemblage Zones for the Lower Bajocian of North America (Classic Reprint)
Lower Bajocian (Jurassic) Cephalopod Faunas from Western Canada, And, Proposed Assemblage Zones for the Lower Bajocian of North America (Classic Reprint)