The Paleozoic Formations of Allegany County, Maryland Charles Smith Prosser Published: 1901 Total Pages: 36 Get eBook
Reports Dealing with the Systematic Geology and Paleontology of Maryland. Maryland Geological Survey Published: 1913 Total Pages: 602 Get eBook
Maryland Geological Survey: pt.1] Lower Devonian, text Maryland Geological Survey Published: 1913 Total Pages: 602 Get eBook
Reports Dealing with the Systematic Geology and Paleontology of Maryland: Devonian. 1913. 3 v Maryland Geological Survey Published: 1913 Total Pages: 604 Get eBook
Bulletin of the United States Geological Survey Geological Survey (U.S.) Published: 1904 Total Pages: 256 Get eBook