@article{1183735613,
author = {Hatcher, William S.},
title = {Logical Truth and Logical Implication},
journal = {J. Symbolic Logic},
volume = {31},
number = {1},
year = {1966},
language = {en},
url = {http://dml.mathdoc.fr/item/1183735613}
}
Hatcher, William S. Logical Truth and Logical Implication. J. Symbolic Logic, Tome 31 (1966) no. 1, . http://gdmltest.u-ga.fr/item/1183735613/