Small scale gold mining in the Philippines: A cost benefit analysis

by De Guzman, Ronald, Perez, Antonio, Jr., Ong, Jefferson
Published 1995

Ang penomena ng paghihiganti ayon sa mga bilanggo

by Cruz, Rolando B., De Guzman, Ronald Joseph A., Landrito, Michael Marion C.
Published 1999

A feasibility study on DWBH Corporation

by Ang, Ena Marie R., Bustamante, Ma. Monique, Chan, Mirabelle, Chua, Wilaine Audrey Tan, Cimagala, Tristan Angelo, Danao, Philipp, De Guzman, Ronald Joseph, Landrito, Michael Marion, Yu, Joel C.
Published 1999