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1
Harrisburg, PA : Distributed by Field Conference of Pennsylvania Geologists c/o Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1981

Government Document Conference Proceeding Book
2
Madison, Wis., Atwood & Culver, 1876

Conference Proceeding Book
3
Washington, D.C. : Denver, CO : U.S. G.P.O. ; Free on application to Book and Open-File Report Sales, U.S. Geological Survey, 1992

Government Document Conference Proceeding Book
4
[Harrisburg] : Pennsylvania Geological Survey, 1959

Government Document Conference Proceeding Book
5
Washington, D.C. : Denver, CO : U.S. G.P.O. ; Free on application to Book and Open-File Report Sales, U.S. Geological Survey, 1992

Government Document Conference Proceeding Book
6
[Harrisburg, Pa.] : [Conference] : Distributed by Bureau of Topographic and Geologic Survey, Dept. of Environmental Resources, 1974

Government Document Conference Proceeding Book
7
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1970

Government Document Conference Proceeding Book
8
Hanover, N.H. : Published for University of New Hampshire by University Press of New England, 1979

Conference Proceeding Book
9
Washington : Alexandria, VA : U.S. G.P.O. ; For sale by the Branch of Distribution, U.S. Geological Survey, 1985

Government Document Conference Proceeding Book
10
[Reston, Va.?] : Dept. of the Interior, U.S. Geological Survey ; 1989

Government Document Conference Proceeding Book
11
New York : Consultants Bureau, 1973

Conference Proceeding Book
12
Washington : U. S. Govt. print. off., 1933

Conference Proceeding Book
13
Cambridge, Mass. : M.I.T. Press, 1966

Conference Proceeding Book
14
Anchorage, Alaska : U.S. Dept. of the Interior, National Park Service, Alaska Regional Office, 1990

Government Document Conference Proceeding Book
15
[Washington, D.C.] : U.S. G.P.O., 1992

Government Document Conference Proceeding Book
16
[Reston, Va.] : The Survey, 1985

Government Document Conference Proceeding Book
17
[Washington, D.C.] : Denver, CO : U.S. G.P.O. ; Books and Open-File Reports Section, U.S. Geological Survey, 1987

Government Document Conference Proceeding Book
18
Washington : U.S. G.P.O., 1989

Government Document Conference Proceeding Book
19
Cambridge, M.I.T. Press 1969

Conference Proceeding Book
20
[Washington] American Geophysical Union of the National Academy of Sciences-National Research Council, 1962

Conference Proceeding Book