1.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1958.
French | 10A OMPI |
2.
Bruxelles [Belgium] : Larcier, 1974.
Italian | 8 BE |
3.
Roma [Italy] : Biblioteca Nazionale Centrale di Roma, 1971.
Italian | 13 IT |
4.
5.
6.
7.
Bern [Switzerland] : Birpi, 1956.
French | E 224:205 |
8.
[Paris, France] : [UNESCO], 1956.
French | 6A OMPI |
9.
10.