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Frederik Wellmann
A. MS.
Several attempts to write the same pages. Basic conventions of the system of existential graphs. A reference to the Monist article of January 1897.
Graphs existential, Graphs logical (see also Diagram Eulerian Graphs), Logic (modal see Modality)
pp. 1-9, plus 21 pp. of variants
1901~
MS0483_022
-
c. 1901