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21
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22
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23
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24Published 1975“...Problems in European civilization....”
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25
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26
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27
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28
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29
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30
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31Published 1990“...Problems in European civilization....”
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32
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33Published 1995“...Problems in European civilization....”
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34Published 1970“...Problems in European civilization....”
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35
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36Published 1961“...Problems in European civilization....”
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37Published 1970“...Problems in European civilization....”
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38Published 1974“...Problems in European civilization....”
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39Published 1972“...Problems in European civilization....”
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40Published 1963“...Problems in European civilization....”
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