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1
Late Cambrian and early Ordovician faunas from the Wilberns formation of central Texas /
by Winston, Donald, 1931-, Nicholls, Harry
Austin : Bureau of Economic Geology, University of Texas, 1967

Government Document Book
2
Cambrian and Ordovician [deposits of Maryland /
by Bassler, Ray S. (Ray Smith), 1878-1961
Baltimore : Johns Hopkins Press, 1919

Book
3
Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Medina County, Ohio, through southwestern and south-central Pennsylvania to Hampshire County, West Virginia /
by Ryder, Robert T.
[Reston, Va.] : [Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey ; [USGS Information Services [distributor], 2003
Version 2.0.

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Government Document Book
4
Cambrian and Ordovician rocks of southern Arizona and New Mexico and westernmost Texas /
by Hayes, Philip T. (Philip Thayer), 1923-
Washington : U.S. Govt. Print. Off., 1975

Government Document Book
5
Stratigraphy, sedimentology, and Cambro-Ordovician paleogeography of the Frederick Valley, Maryland /
by Reinhardt, Juergen, 1946-
Baltimore : Dept. of Natural Resources, Maryland Geological Survey, 1974

Book
6
Stratigraphy of the Cambrian and Lower Ordovician rocks in Ohio,
by Janssens, Adriaan
Columbus, State of Ohio, Division of Geological Survey, 1973

Book
7
Geologic, geochemical, and isotopic studies of a carbonate- and siliciclastic-hosted Pb-Zn deposit at Lion Hill, Vermont /
by Foley, N. K., Clark, Sandra H. B., Woodruff, Laurel Genevieve, 1951-, Mosier, Elwin L.
Washington : Denver, Colorado : United States Government Printing Office ; For sale by U.S. Geological Survey, Information Services, 1995

Government Document Book
8
Systematics, environment, and biogeography of some late Cambrian and early Ordovician trilobites from eastern New York State /
by Taylor, Michael E.
Washington : U.S. Govt. Print. Off., 1974

Government Document Book
9
Subsurface projection of Cambro-Ordovician sediments in the Pennsylvania-New York region /
by Swartz, Frank M. (Frank McKim), 1899-1982
Harrisburg, Pa. : Commonwealth of Pennsylvania, Department of Internal Affairs, Topographic and Geologic Survey, 1950

Government Document Book
10
Sub-Trenton rocks from Lee County, Virginia, to Fayette County, Ohio /
by Calvert, Warren L. (Warren Lytle)
Columbus : State of Ohio, Dept. of Natural Resources, Division of Geological Survey, 1962

Government Document Book
11
Cambrian and Ordovician.
Baltimore, The Johns Hopkins Press, 1919

Book
12
Subsurface Cambro-Ordovician stratigraphy of northwestern Pennsylvania and bordering states.
by Wagner, Warren R. (Warren Richard), 1912-1968
[Harrisburg] Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geological Survey, 1961

Government Document Book
14
Stratigraphy of the Cambrian to Middle Ordovician rocks of central and western Pennsylvania /
by Wagner, Walter Richard, 1928-1974
Harrisburg, PA. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1966

Government Document Book
15
Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania /
by Meisler, Harold
Washington : U.S. Govt. Print. Off., 1968

Government Document Book
16
Upper Cambrian-Lower Ordovician Notch Peak Formation in western Utah /
by Hintze, Lehi F.
Washington : Denver, CO : U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1988

Government Document Book
17
Structure and stratigraphy of the limestones and dolomites of Dauphin County, Pennsylvania /
by MacLachlan, David B.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geological Survey, 1967

Government Document Book
18
Stratigraphy of the Cambrian and Ordovician rocks of east-central Alaska /
by Brabb, Earl E., 1929-
Washington, D.C. : U.S. Govt. Print. Off., 1967

Government Document Book
19
Geology of the carbonate rocks in western Franklin County, Pennsylvania /
by Clark, John H.
[Harrisburg] : Commonwealth of Pennsylvania, State Planning Board, Bureau of Topographic & Geologic Survey, 1970

Government Document Book
20
Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Medina County, Ohio, through southwestern and south-central Pennsylvania to Hampshire County, West Virginia /
by Ryder, Robert T., Harris, Anita G., Repetski, John E.
[Washington D. C.] : Denver, CO : United States G.P.O. ; For sale by Book and Open-File Report Sales, U.S. Geological Survey, 1992

Government Document Book
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