00809nam0-22002651i-450-990001262950403321000126295FED01000126295(Aleph)000126295FED0100012629520000920d1963----km-y0itay50------baengDirect and Converse TheoremsThe elements for symbolic logicby GrasthteinOxford [etc.]Pergamon Press1963International series of monographs on pure and applied mathematics27 ̜volGradshteyn,Izrail Solomonovich344566ITUNINARICAUNIMARCBK990001262950403321C-37-(274876MA1MA1Direct and Converse Theorems354550UNINAING01