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21by Grow, MichaelSubjects “...Presidents United States Decision making Case studies....”
Published 2008
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22by Catton, TheodoreSubjects “...United States. National Park Service History Case studies....”
Published 1997
Book -
23
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24by Benson, ErikSubjects “...Aeronautics, Commercial Government policy United States History 20th century....”
Published 2006
Table of contents
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25
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26
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27Subjects “...Industrial safety Government policy United States Case studies....”
Book -
28
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29
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30by Schivelbusch, Wolfgang, 1941-“...United States History Civil War, 1861-1865 Psychological aspects....”
Published 2003
Book