Judul asli : "Earth in the Balance Ecology and the Human Spirit"
Termasuk bibliografi
No Inv.: 2395/Perp/89/1c~2652-2653/P/Perp/91/2c
No Inv.: 1721/S/96/1c
Judul asli : "How to Negotiate Worldwide"
No Inv.: 416-419/S/Perp/92/4c~80062-80065/S/02/4c
No Inv.: 108/P/Perp/92/1c~1083/S/Perp/90/1c~1931/S/Perp/88/1c~704/S/Perp/90/1c~110-112/Pb/Perp/92/3c~2371-2375/P/Perp/95/5c~2754-2763/P/Perp/97/10c
No Inv.: 911-913/P/Perp/92/3c~19/S/Perp/93/1c~1561/S/Perp/89/1c~2670-2679/P/Perp/98/10c~115294/S/Perp/08/1c~115356/PH/Perp/08/1c~130181/PH/Perp/11/1c~135882/PH/Perp/13/1c
Bibliograi : hlm. 223-236