Mesolas, Herwil R., <br/><br/>
Telephone privacy adapter 
Herwil R. Mesolas, Maricel P. Olaso, Edmer M. Serafin 
 - Nabua, Camarines Sur :  Camarines sur Polytechnic Colleges ;  2007. 
 - 53 leaves. 
<br/><br/>Undergraduate Thesis (BSECE) - Electronics Engineering