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 Uppe