1.
[Place of publication not identified] : [publisher not identified], 1976.
Finnish | 20 JP |
2.
Geneva [Switzerland] : International Bureau for the Protection of Industrial Property, 1968.
English | 10B OMPI |
3.
4.
Geneva Switzerland : World Intellectual Property Organization, 1991.
English | E 2314G170 WIPO.RE |
5.
6.
7.
Geneva : World Intellectual Property Organization, 1989.
English | E 2314G11 WIPO.T |
8.
9.
10.