No Inv.: 3284-3288/P/perp/99/5c~89118/s/perp/04/1c
Judul asli : "Preparing for the Twenty-first Century"
No Inv.: 4232-4236/P/Perp/99/5c
No Inv.: 2592/Perp/89/1c~3127-3128/P/Perp/91/2c~77785/S/01/1c
No Inv.: 357-359/P/Perp/92/3c~7427-7432/P/Perp/92/6c~3697-3701/P/Perp/92/5c
No Inv.: 4218-4222/P/Perp/99/5c
No Inv.: 79051-79056/01/6c~79480-79487/S/01/8c
No Inv.: 505-514/P/Perp/96/10c
No Inv.: 49-50/Perp/86/2c
No Inv.: 1280-1284/P/Perp/94/5c~1931-1940/P/Perp/95/10c