Demanarig, Hazel D., <br/><br/>
Electronic combination lock with alarms/ 
Hazel D. Demanarig, Jennifer B. Oblina, Ma. Charina L. Sapinoso 
 - Nabua, Camarines Sur :  Camarines sur Polytechnic Colleges ;  2008. 
 - 76 leaves 
<br/><br/>Undergraduate Thesis (BSECE) - Electronics Engineering