1.
[Place of publication not identified] : [publisher not identified], 1989.
English | 85 US |
2.
3.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1986.
French | 10A OMPI |
4.
Geneva [Switzerland] : International Bureau for the Protection of Industrial Property, 1986.
English | 10B OMPI |