1.
2.
Buffalo, New York : The Patent and Trademark Office Society, 1986.
Danish | 47 US |
3.
4.
5.
[Place of publication not identified] : [publisher not identified], 1970.
Finnish | 29 US |
6.
7.
[Place of publication not identified] : [publisher not identified], 1976.
English | 13 US |
8.
Buffalo, New York : The Patent and Trademark Office Society, 1970.
English | 47 US |
9.
Tokyo [Japan] : International Association for the Protection of Intellectual Property (AIPPI), 1981.
French | 2 JP |
10.
Tokyo [Japan] : International Association for the Protection of Intellectual Property (AIPPI), 1983.
Danish | 2 JP |