שנה ללא קיץ – הבדלי גרסאות

*Baumler, Alan. '''The Chinese and Opium Under the Republic: Worse than Floods and Wild Beasts.''' New York: State University Press, 2007. ISBN 978-0-7914-6953-8

*Oppenheimer, Clive. '''Eruptions that Shook the World.''' Cambridge: University Press, 2011. ISBN 978-0-5216-4112-8

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