|
1.
|
Geneva, Switzerland : World Intellectual Property Organization, 2000.
English | E 3330 WIPO.J |
|
|
2.
|
Ottawa, Ontario : Intellectual Property Institute of Canada, 1996.
English | 4 CA |
|
|
3.
|
Buffalo, New York : The Patent and Trademark Office Society, 1999.
English | 47 US |
|
|
4.
|
Ottawa, Ontario : Intellectual Property Institute of Canada, 1996.
English | 4 CA |
|