A. N. Prior:
On Propositions Neither Necessary Nor Impossible.
105-108 BibTeX
J. C. C. McKinsey:
Systems of Modal Logic Which are Not Unreasonable in the Sense of Hallden.
109-113 BibTeX
Shen Yuting:
Paradox of the Class of All Grounded Classes.
114 BibTeX
John R. Myhill:
Arithmetic with Creative Definitions by Induction.
115-118 BibTeX
W. V. Quine:
On omega;-Inconsistency and a So-Called Axiom of Infinity.
119-124 BibTeX
J. Richard Büchi:
Investigation of the Equivalence of the Axiom of Choice and Zorn's Lemma from the Viewpoint of the Hierarchy of Types.
125-135 BibTeX
