Judul asli : "The Management of Learning"
No Inv.: 510/AF/Perp/91/1c
No Inv.: 13937/P/Perp/94/1c~82649/S/02/1c~103155/S/Perp/05/1c~103312/S/Perp/05/1c~105143/P/Perp/06/1c
No Inv.: 617/S/Perp/93/1c~4991-4994/P/Perp/97/4c~410-412/S/00/3c
No Inv.: 13842-13843/P/Perp/94/2c
No Inv.: 11606-11615/P/Perp/93/10c
No Inv.: 301/AF/Perp/94/1c~13988/P/Perp/94/1c
No Inv.: 721-724/S/Perp/90/4c~739/S/Perp/90/1c~131-135/S/Perp/94/5c
No Inv.: 1537-1539/BD/Perp/91/3c~14330/P/Perp/94/1c
Judul asli : "Beginning Hydroponics"