Nidditch, P. H..
Propositional calculus /
by P.H. Nidditch 
. - London : Routledge & Kegan Paul Ltd, New York : Dover Publications Inc.,  1965 
. - viii, 83 p.  18 cm. 
 - (Monographs in modern logic )
<br/>К.: Бібліогр. : c. 82, Index