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21“...U.S. Department of the Interior, U.S. Geological Survey,...”
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22“...U.S. Department of the Interior, U.S. Geological Survey,...”
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23by Spencer, Charles Winthrop, 1930-“...[U.S. Department of the Interior, U.S. Geological Survey],...”
Published 1983
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24by Buursink, Mark L.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2014
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25by Roehler, Henry W.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1991
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26by Roehler, Henry W.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1993
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27by Roehler, Henry W.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1990
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28by Wirt, Laurie“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1999
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29by Ficklin, Walter H.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1994
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30“...U.S. Department of the Interior, U.S. Geological Survey,...”
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31“...U.S. Department of the Interior, U.S. Geological Survey,...”
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32by Ball, Lyndsay B.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2015
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33by Bossong, C. R.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2000
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34“...U.S. Department of the Interior, U.S. Geological Survey,...”
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35by McMahon, Peter B.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1995
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36by Connor, Jon J.“...Department of the Interior, U.S. Geological Survey,...”
Published 1988
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37by Franczyk, Karen J.“...Department of the Interior, U.S. Geological Survey,...”
Published 1989
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