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21
por Bacon, Charles R.
Washington : Alexandria, VA : U.S. G.P.O. ; For sale by the Branch of Distribution, U.S. Geological Survey, 1982
Washington : Alexandria, VA : U.S. G.P.O. ; For sale by the Branch of Distribution, U.S. Geological Survey, 1982
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22
por Farrow, Richard A.
Washington : U.S. Govt. Print. Off., 1973
Washington : U.S. Govt. Print. Off., 1973
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23
por Hotz, Preston Enslow, 1913-
Washington : U.S. Govt. Print. Off., 1972
Washington : U.S. Govt. Print. Off., 1972
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24
por Markewich, Helaine W.
Washington : Alexandria, VA : U.S. G.P.O. ; For sale by the Distribution Branch, U.S. Geological Survey, 1982
Washington : Alexandria, VA : U.S. G.P.O. ; For sale by the Distribution Branch, U.S. Geological Survey, 1982
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25
por Cadigan, Robert Allen, 1918-
Washington : U.S. Govt. Print. Off., 1971
Washington : U.S. Govt. Print. Off., 1971
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26
por Richter, Donald H.
Washington : U.S. Govt. Print. Off., 1975
Washington : U.S. Govt. Print. Off., 1975
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27
por Moore, James Gregory, 1930-
Washington : U.S. Govt. Print. Off., 1972
Washington : U.S. Govt. Print. Off., 1972
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28
por Kleinhampl, F. J. (Frank Joseph), 1927-
Washington : U.S. Govt. Print. Off., 1975
Washington : U.S. Govt. Print. Off., 1975
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29
por Snyder, John Parr, 1926-
[Reston, Va.] : Washington, D.C. : U.S. Geological Survey ; For sale by Supt. of Docs., U.S. G.P.O., 1981
[Reston, Va.] : Washington, D.C. : U.S. Geological Survey ; For sale by Supt. of Docs., U.S. G.P.O., 1981
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30
por McAllister, James F. (James Franklin), 1911-
Washington : U.S. Govt. Print. Off., 1974
Washington : U.S. Govt. Print. Off., 1974
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31
32
por Seeland, David A.
Washington : U.S. Govt. Print. Off., 1978
Washington : U.S. Govt. Print. Off., 1978
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33
por Anderson, Charles A. (Charles Alfred), 1902-1990
Washington : U.S. Govt. Print. Off., 1971
Washington : U.S. Govt. Print. Off., 1971
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34
por Keefer, William R., 1924-
[Washington] : [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971
[Washington] : [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971
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35
por McIntyre, David H.
Washington : U.S. Govt. Print. Off., 1974
Washington : U.S. Govt. Print. Off., 1974
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36
por Chaffee, Maurice A.
Washington : U.S. Govt. Print. Off., 1972
Washington : U.S. Govt. Print. Off., 1972
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37
por Herrick, Stephen M. (Stephen Marion), 1904-
Washington : U.S. Govt. Print. Off., 1972
Washington : U.S. Govt. Print. Off., 1972
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38
por Lesure, Frank Gardner, 1927-, Geraci, Philip J., Mory, Peter C., Williams, Bradford B.
Washington : United States Government Printing Office, 1977
Washington : United States Government Printing Office, 1977
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39
por Nilsen, Tor Helge
Washington : U.S. Govt. Print. Off., 1975
Washington : U.S. Govt. Print. Off., 1975
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40
por Haffty, Joseph, 1922-, Riley, L. B. (Leonard Benjamin), 1905-, Goss, W. D.
Washington : U.S. Govt. Print. Off., 1977
Washington : U.S. Govt. Print. Off., 1977
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