Innovated doorbell system/
Bacagan, Rizalde F.,
Innovated doorbell system/ Rizalde F. Bacagan, Ma. Rowena B. Sto Domingo, Vanessa G. Vasquez - Nabua, Camarines Sur : Camarines Sur Polytechnic Colleges ; 2005. - 52 leaves.
Undergraduate Thesis (BSECE) - Electronics Engineering
Innovated doorbell system/ Rizalde F. Bacagan, Ma. Rowena B. Sto Domingo, Vanessa G. Vasquez - Nabua, Camarines Sur : Camarines Sur Polytechnic Colleges ; 2005. - 52 leaves.
Undergraduate Thesis (BSECE) - Electronics Engineering