00387nam a2200085Ia 4500008004100000100002600041245013300067264008200200521001900282230520s2012    xx            000 0 und d  aBola, Mark Gregory B.10aEmilio Aguinaldo College electronic messaging system using GSM (Global System for Mobile Communication) /cBola, Mark Gregory B.  a[Place of publication not identified] : b[Publisher not identified], c2012.  aENGG_MCOMPENGG