00322nam a2200133Ia 4500008004100000020001800041082001000059082001000069100001700079245005000096260001400146260001900160260000900179230118s9999||||xx |||||||||||||| ||und||  a81-250-1106-4  a547.2  bSYK/A  apeterbsykes 2aa guidebook to mechanism in organic chemistry  ahyderabad  borient longman  c1970