.. Key to the upper Devonian of southern New York; designed for teachers and students in secondary schools . Tpg £JP KEUFFEL & ESSER CO. NEW YORK 127 FULTON Street & ANN StreetESTABLISHED 1867 AND SURVEYING INSTRUMENTS BRANCHES iti Madison St., Chicago708 Locust St., St. Louis.

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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology