Laura, Ramel G., <br/><br/>
Variable diameter trepanning tool/ 
Ramel G. Laura., Rene B. Tirao., Ryan S. Turing.,  
 - Nabua, Camarines Sur :  Camarines sur Polytechnic Colleges ;  2005. 
 - 52 leaves. 
<br/><br/>Undergraduate Thesis (BSME) - Mechanical Engineering