No Inv.: 14410/P/Perp/94/1c
No Inv.: 10413-10417/P/Perp/92/5c
No Inv.: 1537-1539/BD/Perp/91/3c~14330/P/Perp/94/1c
Judul asli : "Beginning Hydroponics"
No Inv.: 196/P/Perp/93/1c
No Inv.: 4243/P/Perp/91/1c
Judul asli : "Elements of Regional Economics"
No Inv.: 294/AF/Perp/94/1c
No Inv.: 1317/P/Perp/92/1c
No Inv.: 623/AF/Perp/88/1c