Middle and Upper Devonian, text
At head of title: Maryland Geological Survey Plates 7-73 are in a separate volume with the plates of the Lower Devonian "The sixth volume of a series of reports dealing with the systematic geology and paleontology of Maryland." W.B. Clark, state geologist Preface.--The Middle Devonian deposits of Maryland. by C. S. Prosser, E. M. Kindle and C. K. Swartz.--Systematic paleontology of the Middle Devonian deposits of Maryland, by C. S. Prosser, E. M. Kindle, E. O. Ulrich and R. S. Bassler.--The Upper Devonian deposits of Maryland, by C. S. Prosser and C. K. Swartz.--Systematic paleontology of the Upper Devonian deposits of Maryland, by J. M. Clarke and C. K. Swartz.--General index.--Paleontological index
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