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21Published in Journal of the Franklin Institute (1955)Get access
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22Published in Journal of the Franklin Institute (1843)Get access
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23Published in Journal of the Franklin Institute (1953)Get access
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24Published in Journal of the Franklin Institute (1941)Get access
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25
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26Published in Journal of the Franklin Institute (1925)Get access
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28
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29Published in Journal of the Franklin Institute (1919)Get access
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30Published in Journal of the Franklin Institute (1921)Get access
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31
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32Published in Journal of the Franklin Institute (1874)Get access
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33Published in Journal of the Franklin Institute (1837)Get access
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34Published in Journal of the Franklin Institute (1867)Get access
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35Published in Journal of the Franklin Institute (1843)Get access
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38
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39Published in Journal of the Franklin Institute (1957)Get access
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40Published in Journal of the Franklin Institute (1848)Get access
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