Bibliografi : hlm. 437 - 458
No Inv.: 133363,133441/S/Perp/13/2c
No Inv.: 111-113/P/Perp/96/3c
Judul asli : "Element of Philosophy"
No Inv.: 234/S/Perp/90/1c~135436/SM/Perp/13/1c~136290/SM/Perp/13/1c~136614/SM/Perp/14/1c
Bibliografi : hlm. 171-178
No Inv.: 74848-74849/P/01/2c~84275-84276/P/Perp/02/2c~134806/SM/Perp/13/1c~137740-137744/P/Perp/5c
Bibliografi : hlm. 183-184
No Inv.: 4620-4629/P/Perp/92/10c~3146-3150/P/Perp/95/5c