Analysis of information sources in references of the Wikipedia article "Karl Schwarzschild" in English language version.
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: CS1 maint: location missing publisher (link) CS1 maint: others (link){{cite book}}
: CS1 maint: location missing publisher (link) CS1 maint: others (link){{cite book}}
: CS1 maint: location missing publisher (link) CS1 maint: others (link)