Del Grande, J. J.
An introduction to the nature of proof / J.J. Del Grande, J.C. Egsgard, H.A. Mulligan ; [edited by] A.J. Coleman. - Toronto : Gage, c1967. - viii, 59 p. : ill.
Proof theory.
Logic, Symbolic and mathematical.
An introduction to the nature of proof / J.J. Del Grande, J.C. Egsgard, H.A. Mulligan ; [edited by] A.J. Coleman. - Toronto : Gage, c1967. - viii, 59 p. : ill.
Proof theory.
Logic, Symbolic and mathematical.