1.
2.
Paris [France] : Gobin, 1975.
French | N 637 GOB.F |
3.
4.
5.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1980.
English | 6B OMPI |
6.
7.
[Place of publication not identified] : [publisher not identified], 1988.
French | N 637 NIK.P |
8.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1980.
English | 6B OMPI |
9.
10.