Analysis of information sources in references of the Wikipedia article "Type VII submarine" in English language version.
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: CS1 maint: multiple names: authors list (link) The cost of a Type VII is estimated at US$2.25 million (equivalent to $30 million in 2023).{{cite web}}
: CS1 maint: multiple names: authors list (link) The cost of a Type VII is estimated at US$2.25 million (equivalent to $30 million in 2023).