Judul asli : "Electrical Instalation Technology"
No Inv.: 332/S/Perp/91/1c~1141/S/Perp/92/1c~5810-5829/P/Perp/92/20c~71934/S/01/1c~121177/PH/Perp/09/1c~129371,129372/PH/Perp/11/2c~129978/PH/Perp/11/1c
No Inv.: 2619-2623/P/Perp/92/5c
Judul asli : "Principles of Geotechnical Engineering"
No Inv.: 13953-13955/P/Perp/94/3c~14143/P/Perp/94/1c~2920/P/Perp/96/1c~86714-86715/P/Perp/03/2c
No Inv.: 211/S/Perp/90/1c~2457/S/Perp/90/1c~1678-1679/P/Perp/92/2c~7341-7350/P/Perp/92/10c~996-1000/P/Perp/94/5c~4268-4285/P/Perp/97/18c~8646-8655/P/Perp/97/10c~107677/P/Perp/06/1c~117517/P/Perp/09/1c
No Inv.: 1118/P/Perp/92/1c~1088/P/Perp/94/1c~13888-13893/P/Perp/94/6c
No Inv.: 2730-2731/P/Perp/91/2c~1826-1830/P/Perp/95/5c
No Inv.: 889-891/P/Perp/92/3c~4540-4544/P/00/5c~89632/PSM/Perp/04/1c~117667/P/Perp/09/1c