1.
2.
3.
4.
New York : Harper & Brothers, 1952.
English | N 751 LIN.P |
5.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1981.
English | 6B OMPI |
6.
7.
8.
[Place of publication not identified] : [publisher not identified], 1984.
Italian | 20 IT |
9.
[Place of publication not identified] : [publisher not identified], 1985.
English | 68 US |
10.
[Paris, France] : [UNESCO], 1963.
French | 6A OMPI |