Robert Gauss to Felix Klein - September 3, 1912
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Robert Gauss to Felix Klein - September 3, 1912
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Public-domain status shown for US. Wikisource marks this text PD-old; publication year 1912 is within the US public-domain cutoff
Public-domain status shown for US. Wikisource marks this text PD-old; publication year 1912 is within the US public-domain cutoff