North American geology and pal?ontology for the use of amateurs, students, and scientists
North American mesozoic and c?nozoic geology and pal?ontology; or, An abridged history of our knowledge of the triassic, jurassic, cretaceous and tertiary formations of this continent
The American Palaeozoic fossils: a catalogue of the genera and species, with names of authors, dates, places of publication, groups of rock in which . an introduction devoted to the stratigraphic
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