1.
London [England] : Trade Marks, Patents and Designs Federation, 1976.
English | 41 GB |
2.
Geneva [Switzerland] : International Bureau for the Protection of Industrial Property, 1984.
English | 10B OMPI |
3.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1984.
French | 10A OMPI |