Revale, Norman R., <br/><br/>
Portable electronic guitar tuner/ 
Norman R. Revale, Wilhem A. Samper Jr., Arnel B. Taduran 
 - Nabua, Camarines Sur :  Camarines sur Polytechnic Colleges ;  2006. 
 - 50 leaves. 
<br/><br/>Undergraduate Thesis (BSECE) - Electronics Engineering