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Frederik Wellmann
A. MS.
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Graphs existential, Reviews CSP's principally for The Nation
pp. 1-3 1-6, 8-9, with a variant p. 4 1 p. plus 5 pp. in a notebook containing several pages of notes on existential graphs ("Studies of the Eight Systems of Existential Graphs").
1904
MS1483_049
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1904