TY  - BOOK
AU  - Portillo, Reynaldo R. (et.al.)
TI  - Research and technical writing
SN  - 971-42-0393-7
U1  - Fil. 001.4 P830 c2003 
PY  - 2003///
CY  - Philippines
PB  - Trinitas Publishing, Inc.
ER  -