Hughes, G E .
An introduction to modal logic / G. E. Hughes and M. J. Cresswell. - London : Methuen , 1968. - xi, 388p. : ills.,figs. ; 22cm ` .
Includes index
NULL (Pb)
LOGIC
160 / HUG/I
An introduction to modal logic / G. E. Hughes and M. J. Cresswell. - London : Methuen , 1968. - xi, 388p. : ills.,figs. ; 22cm ` .
Includes index
NULL (Pb)
LOGIC
160 / HUG/I
