No Inv.: 90451-90452/P/Perp/04/2c
No Inv.: 90525-90529/P/Perp/04/5c
No Inv.: 90569/P/Perp/04/1c
No Inv.: 100000/S/perp/04/1c
No Inv.: 90649/P/Perp/04/1c
No Inv.: 90590-90591/P/Perp/04/2c
Judul asli :"Principles of economics"
No Inv.: 101678-101680/P/Perp/05/3c
No Inv.: 101715-101716/P/Perp/05/2c
No Inv.: 102122-102125/P/Perp/05/4c~104770-104774/P/Perp/06/5c