No Inv.: 70790-70798/Perp/70/9c~70175/Perp/70/1c~70701/Perp/70/1c~70177/Perp/70/1c~70166/Perp/70/1c~60168/Perp/70/1c~80441/Perp/70/1c~82128/Perp/71/1c
Judul asli : "Einfuhrung in die variations rechnung"
No Inv.: 11586-11588/P/Perp/98/3c~e120952/PH/Perp/09/1c
No Inv.: 1056-1060/P/Perp/98/5c
No Inv.: 11272/P/Perp/98/1c
No Inv.: 350/P/Perp/98/1c~75910-75914/01/5c
No Inv.: 11032/P/Perp/98/1c
No Inv.: 11826/P/Perp/98/1c
Judul asli : "Ecology and Tropical Biology"
No Inv.: 3024/P/Perp/98/1c