No Inv.: 45/AF/Perp/89/1c~174/Perp/93/1c
No. Inv. : 146072/S/Perp/15/1c
Judul asli : "Introduction to the Study of Soils in Tropical and Subtropical Regions"
No Inv.: 4280/P/Perp/91/1c~846/S/Perp/92/1c
No Inv.: 673/P/Perp/94/1c
No Inv.: 373/AF/Perp/91/1c
No Inv.: 551/P/Perp/94/1c
No Inv.: 253/Perp/89/1c
No Inv.: 1326-1327/BD/Perp/86/2c
No Inv.: 2072-2073/BD/Perp/87/2c