Analysis of information sources in references of the Wikipedia article "Medieval Warm Period" in English language version.
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: CS1 maint: multiple names: authors list (link) Box 6.4 Archived 2015-03-28 at the Wayback Machine{{cite book}}
: CS1 maint: multiple names: authors list (link) Box 6.4 Archived 2015-03-28 at the Wayback Machine