Batalia, Joy P., <br/><br/>
Audio-muting device/ 
Joy P. Batalia, Liezel B. Bolalin, Ronald T. Bucad 
 - Nabua, Camarines Sur :  Camarines Sur Polytechnic Colleges ;  2005. 
 - 68 leaves. 
<br/><br/>Undergraduate Thesis (BSECE) - Electronics Engineering