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colorado (états-unis)
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View Freshwater diatom floristics of the late Eocene Florissant Formation, Clare's Quarry site, Central Colorado, USA By Mary Ellen Benson
Freshwater diatom floristics of the late Eocene Florissant Formation, Clare's Quarry site, Central Colorado, USA
Freshwater diatom floristics of the late Eocene Florissant Formation, Clare's Quarry site, Central Colorado, USA
By Mary Ellen Benson
View A Lady's life in the Rocky Mountains By Isabella L. Bird 
A Lady's life in the Rocky Mountains
By Isabella L. Bird