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- 21020680 contributor B615756.
- 21020680 created "1921.".
- 21020680 date "1921".
- 21020680 date "1921.".
- 21020680 dateCopyrighted "1921.".
- 21020680 description "Thesis (Ph. D.)--Columbia University, 1920.".
- 21020680 extent "1 p. l., 163-185, [1] p.".
- 21020680 issued "1921".
- 21020680 issued "1921.".
- 21020680 language "eng".
- 21020680 publisher "[Baltimore]".
- 21020680 subject "BC135 .P7".
- 21020680 subject "Logic, Symbolic and mathematical.".
- 21020680 title "Introduction to a general theory of elementary propositions, by Emil L. Post.".
- 21020680 type "text".