1.
Leyden : Sijthoffs Publishing Co, 1968.
Third revised.
English | N 313 BOG.L(3) 1968 |
2.
3.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1992.
German | N 44(254) CN 7 |
4.
5.
6.
7.
8.
9.
Tokyo [Japan] : Copyright Research And Information Center (CRIC), 2001.
English | N 44 COP 2001 |
10.
[Paris, France] : [UNESCO], 1991.
English | C 383 UNESCO 3B |