1.
2.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1987.
English | 10A OMPI |
3.
[Place of publication not identified] : [publisher not identified], 1968.
German | G 870 HAE.D |
4.
5.
6.
Geneva [Switzerland] : International Bureau for the Protection of Industrial Property, 1971.
French | 10B OMPI |
7.
Geneva [Switzerland] : International Bureau for the Protection of Industrial Property, 1987.
English | 10B OMPI |
8.
9.
10.