00310nam a2200133Ia 4500003000400000005001700004008004100021020001800062100001900080245003300099260002600132300001000158350000800168SNU20150611133802.0120327s9999    xx            000 0 und d  a9788131723579  aVirginia Klenk  aUnderstanding Symbolic Logic  bHindustan Book Agency  a479p.  a425