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21
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22
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23
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24by Zittel, Karl Alfred von, 1839-1904Subjects: “...Geology History....”
Published 1899
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25by Zittel, Karl Alfred von, 1839-1904Subjects: “...Geology History....”
Published 1901
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26by O'Donnell, James Joseph, 1932-Subjects: “...Socialism History....”
Published 1965
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27
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28by Forbes, James David, 1809-1868Subjects: “...Mathematics History....”
Published 1858
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29
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30by Urbanitzky, Alfred, Ritter von, 1852-Subjects: “...Electricity History....”
Published 1887
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31Published 1835Subjects: “...Philosophy History....”
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32by Howitt, Mary (Mary Botham), 1799-1888Subjects: “...Natural history Juvenile history....”
Published 1856
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33
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34by Quetelet, Adolphe, 1796-1874Subjects: “...Science Belgium History....”
Published 1866
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35by Quetelet, Adolphe, 1796-1874Subjects: “...Science Belgium History....”
Published 1864
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36by Fletcher, William, mechanical engineerSubjects: “...Traction-engines History....”
Published 1891
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37Subjects: “...History, Ancient....”
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38
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39
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40by Candolle, Alphonse de, 1806-1893Subjects: “...Science History....”
Published 1885
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