Henry M. Sheffer

A set of five independent postulates for Boolean algebras, with application to logical constants

Henry M. Sheffer, 1913 .

Principia Mathematica. Whitehead, Alfred North , Russell, Bertrand

Henry M. Sheffer, 1926 .

Structure, Method and Meaning

Horace M. Kallen, Susanne K. Langer, Roderick M. Chisholm, 1952 .

Book Review:Substance and Function and Einstein's Theory of Relativity Ernst Cassirer, Marie C. Swabey, William C. Swabey

Henry M. Sheffer, 2022 .

A Survey Of Symbolic Logic

C. Lewis, Henry M. Sheffer, 1920 .