No Inv.: 1052/S/Perp/92/1c~171/S/Perp/93/1c~3546-3555/P/Perp/95/10c~1384-1388/P/Perp/95/5c
No Inv.: 82309/Perp/71/1c~49796/Perp/69/1c~82307/Perp/71/1c
No Inv.: 2914-2923/P/Perp/97/10c
No Inv.: 2421-2422/Perp/85/2c~1540-1542/BD/Perp/91/3c~141-142/P/Perp/94/2c~3676/Pb/Perp/91/1c~14201-14203/P/Perp/94/3c~742-746/P/Perp/94/5c~87658/P/Perp/04/1c
No Inv.: 67635-67642/S/00/9c~77916-77921/S/01/6c
Judul asli : "Filosofische Orientatie"
Judul asli : "Advice to a Young Scientist"
No Inv.: 2675-2684/P/Perp/92/10c
No Inv.: 2775-2783/P/97/9c~310/PSM/99/1c~459/S/00/1c~77598/S/01/1c