1. 1
    A history of brewing in Holland, 900-1900 economy, technology, and the state /
    by Unger, Richard W.
    Published 2001
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  2. 2
    The ship in the medieval economy, 600-1600 /
    by Unger, Richard W.
    Published 1980
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  3. 3
    Beer in the Middle Ages and the Renaissance
    by Unger, Richard W.
    Published 2004
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  4. 4
    The Art of medieval technology : images of Noah the shipbuilder /
    by Unger, Richard W.
    Published 1991
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  5. 5
    Shipping and economic growth 1350-1850
    Published 2011
    Other Authors: “…Unger, Richard W.…”
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  6. 6
    Britain and Poland-Lithuania contact and comparison from the Middle Ages to 1795 /
    Published 2008
    Other Authors: “…Unger, Richard W.…”
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  7. 7
    Cartography in antiquity and the Middle Ages fresh perspectives, new methods /
    Published 2008
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